check before: 2026-09-30
Product:
Copilot, Exchange, Microsoft 365 admin center, Microsoft Graph, Power Platform
Platform:
Developer, Online, Web, World tenant
Status:
Change type:
GDPR, User impact, Admin impact, Retirement
Links:
Details:
Summary:
Exchange Web Services (EWS) in Exchange Online will be blocked starting October 1, 2026. Organizations must migrate active EWS applications to Microsoft Graph, Power Platform, or Copilot Declarative Agents. Most EWS apps can already be safely migrated despite some parity gaps. Begin modernization now.
Details:
Updated October 15, 2025: We have updated the message to show as intended. Thank you for your feedback.
In 2018, we announced that we were no longer making feature updates to Exchange Web Services (EWS) in Exchange Online, and we advised developers to move to Microsoft Graph.
In September 2023, we announced that on October 1, 2026, we will start blocking EWS requests to Exchange Online.
We are now less than 12 months from October 1, 2026. We have made progress on closing several parity gaps with more changes in development to be released in the coming quarters. Please refer to Deprecation of Exchange Web Services in Exchange Online for up-to-date guidance and roadmap information.
You are receiving this notification because there are EWS applications in your tenant.
If you haven't already, start the process of working with your application development organization and your application vendors to either sunset or migrate active EWS applications on your tenant to the Graph API or Power Platform, or Copilot Declarative Agents.
While we are aware of certain parity gaps in Graph API we can confidently say based on EWS usage telemetry that the vast majority of custom LOB EWS applications can already be safely migrated to alternative technologies.
[When this will happen:]
October 1, 2026
Change Category:
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Scope:
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Release Phase:
Created:
2025-10-15
updated:
2025-11-15
Task Type
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Docu to Check
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MS How does it affect me
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MS Preperations
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MS Urgency
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MS workload name
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summary for non-techies**
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Direct effects for Operations**
EWS Application Functionality Loss
If EWS applications are not migrated by the deadline, they will cease to function, leading to disruption in services that rely on these applications.
- roles: Application Developers, IT Administrators
- references: https://techcommunity.microsoft.com/t5/exchange-team-blog/upcoming-changes-to-exchange-web-services-ews-api-for-office-365/ba-p/608055
User Experience Degradation
Users relying on EWS applications may experience a sudden loss of functionality, leading to frustration and decreased productivity.
- roles: End Users, Support Staff
- references: https://learn.microsoft.com/exchange/client-developer/exchange-web-services/how-to-control-access-to-ews-in-exchange
Increased Support Requests
The transition period may lead to an influx of support requests from users facing issues due to the unavailability of EWS applications.
- roles: Help Desk Staff, IT Support
- references: https://aka.ms/ewsDeprecationMCP
Integration Challenges
Existing integrations with EWS applications may break, requiring additional development work to re-establish functionality with Microsoft Graph or Power Platform.
- roles: Integration Engineers, Application Developers
- references: https://aka.ms/graphMcp
Training and Documentation Needs
There will be a need for updated training and documentation for users and developers to adapt to the new technologies, which may not be ready in time.
- roles: Training Coordinators, Technical Writers
- references: https://aka.ms/ewsToolsMcp
Configutation Options**
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Potentional Risks**
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IT Security**
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explanation for non-techies**
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** AI generated content. This information must be reviewed before use.
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change history
| Date | Property | old | new |
| 2025-11-15 | MC How Affect | In October 2026 we will begin disabling EWS on all M365 tenants worldwide. EWS Applications that have not been migrated will stop functioning.
The following applications on your tenant use EWS: Entra Application ID 6009f132-f149-4391-a1a6-478bc65b1b36 Next Steps Review your application portfolio now to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors.to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors. Prioritize EWS app modernization on your engineering schedule to ensure enough time to address any functionality gaps Disable EWS in your tenant when you no longer have applications that depend on it. We know there are certain parity gaps in Graph API but based on EWS usage telemetry we know that the vast majority of EWS applications can already be safely migrated to Graph API. We encourage you to take the next step and begin the modernization process. Refer to Deprecation of Exchange Web Services in Exchange Online for up-to-date guidance and roadmap information. We also provide a set of open-source tools and tutorials to aid in discovery, analysis and AI assisted modernization of EWS applications. We will publish regular communications as we progress towards this deadline to aid affected tenants in identifying EWS usage. We encourage all customers to monitor Message Center and the Exchange Blog and Deprecation of Exchange Web Services in Exchange Online for related content. Thank you in advance for updating and opening your apps to a wider range of useful and intelligent features on Microsoft Graph. We are extremely excited about the growing opportunities that Microsoft Graph offers to developers, and we remain fully committed to our journey to empower developers to access Microsoft 365 data with the most modern features and tools. | In October 2026 we will begin disabling EWS on all M365 tenants worldwide. EWS Applications that have not been migrated will stop functioning.
The following applications on your tenant use EWS: Entra Application ID fef95295-5986-cc3e-1f1f-572b2f8f6bac, fc8eaab8-e298-47b7-9d2c-abc7f33137af, 00b263e4-3497-4650-b082-3197cfdfdd7c, c55d6177-918e-4745-96d3-1715194bc7e8, 6287b600-88b1-45ce-9e56-4fab9fc07d0b, d2ed0387-a4af-4db0-8d20-8819eeb0b3bc Next Steps Review your application portfolio now to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors.to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors. Prioritize EWS app modernization on your engineering schedule to ensure enough time to address any functionality gaps Disable EWS in your tenant when you no longer have applications that depend on it. We know there are certain parity gaps in Graph API but based on EWS usage telemetry we know that the vast majority of EWS applications can already be safely migrated to Graph API. We encourage you to take the next step and begin the modernization process. Refer to Deprecation of Exchange Web Services in Exchange Online for up-to-date guidance and roadmap information. We also provide a set of open-source tools and tutorials to aid in discovery, analysis and AI assisted modernization of EWS applications. We will publish regular communications as we progress towards this deadline to aid affected tenants in identifying EWS usage. We encourage all customers to monitor Message Center and the Exchange Blog and Deprecation of Exchange Web Services in Exchange Online for related content. Thank you in advance for updating and opening your apps to a wider range of useful and intelligent features on Microsoft Graph. We are extremely excited about the growing opportunities that Microsoft Graph offers to developers, and we remain fully committed to our journey to empower developers to access Microsoft 365 data with the most modern features and tools. |
| 2025-11-14 | MC How Affect | In October 2026 we will begin disabling EWS on all M365 tenants worldwide. EWS Applications that have not been migrated will stop functioning.
The following applications on your tenant use EWS: Entra Application ID fef95295-5986-cc3e-1f1f-572b2f8f6bac, fc8eaab8-e298-47b7-9d2c-abc7f33137af, 00b263e4-3497-4650-b082-3197cfdfdd7c, c55d6177-918e-4745-96d3-1715194bc7e8, 6287b600-88b1-45ce-9e56-4fab9fc07d0b, d2ed0387-a4af-4db0-8d20-8819eeb0b3bc Next Steps Review your application portfolio now to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors.to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors. Prioritize EWS app modernization on your engineering schedule to ensure enough time to address any functionality gaps Disable EWS in your tenant when you no longer have applications that depend on it. We know there are certain parity gaps in Graph API but based on EWS usage telemetry we know that the vast majority of EWS applications can already be safely migrated to Graph API. We encourage you to take the next step and begin the modernization process. Refer to Deprecation of Exchange Web Services in Exchange Online for up-to-date guidance and roadmap information. We also provide a set of open-source tools and tutorials to aid in discovery, analysis and AI assisted modernization of EWS applications. We will publish regular communications as we progress towards this deadline to aid affected tenants in identifying EWS usage. We encourage all customers to monitor Message Center and the Exchange Blog and Deprecation of Exchange Web Services in Exchange Online for related content. Thank you in advance for updating and opening your apps to a wider range of useful and intelligent features on Microsoft Graph. We are extremely excited about the growing opportunities that Microsoft Graph offers to developers, and we remain fully committed to our journey to empower developers to access Microsoft 365 data with the most modern features and tools. | In October 2026 we will begin disabling EWS on all M365 tenants worldwide. EWS Applications that have not been migrated will stop functioning.
The following applications on your tenant use EWS: Entra Application ID 6009f132-f149-4391-a1a6-478bc65b1b36 Next Steps Review your application portfolio now to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors.to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors. Prioritize EWS app modernization on your engineering schedule to ensure enough time to address any functionality gaps Disable EWS in your tenant when you no longer have applications that depend on it. We know there are certain parity gaps in Graph API but based on EWS usage telemetry we know that the vast majority of EWS applications can already be safely migrated to Graph API. We encourage you to take the next step and begin the modernization process. Refer to Deprecation of Exchange Web Services in Exchange Online for up-to-date guidance and roadmap information. We also provide a set of open-source tools and tutorials to aid in discovery, analysis and AI assisted modernization of EWS applications. We will publish regular communications as we progress towards this deadline to aid affected tenants in identifying EWS usage. We encourage all customers to monitor Message Center and the Exchange Blog and Deprecation of Exchange Web Services in Exchange Online for related content. Thank you in advance for updating and opening your apps to a wider range of useful and intelligent features on Microsoft Graph. We are extremely excited about the growing opportunities that Microsoft Graph offers to developers, and we remain fully committed to our journey to empower developers to access Microsoft 365 data with the most modern features and tools. |
| 2025-11-14 | MC How Affect | In October 2026 we will begin disabling EWS on all M365 tenants worldwide. EWS Applications that have not been migrated will stop functioning.
The following applications on your tenant use EWS: Entra Application ID 6009f132-f149-4391-a1a6-478bc65b1b36 Next Steps Review your application portfolio now to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors.to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors. Prioritize EWS app modernization on your engineering schedule to ensure enough time to address any functionality gaps Disable EWS in your tenant when you no longer have applications that depend on it. We know there are certain parity gaps in Graph API but based on EWS usage telemetry we know that the vast majority of EWS applications can already be safely migrated to Graph API. We encourage you to take the next step and begin the modernization process. Refer to Deprecation of Exchange Web Services in Exchange Online for up-to-date guidance and roadmap information. We also provide a set of open-source tools and tutorials to aid in discovery, analysis and AI assisted modernization of EWS applications. We will publish regular communications as we progress towards this deadline to aid affected tenants in identifying EWS usage. We encourage all customers to monitor Message Center and the Exchange Blog and Deprecation of Exchange Web Services in Exchange Online for related content. Thank you in advance for updating and opening your apps to a wider range of useful and intelligent features on Microsoft Graph. We are extremely excited about the growing opportunities that Microsoft Graph offers to developers, and we remain fully committed to our journey to empower developers to access Microsoft 365 data with the most modern features and tools. | In October 2026 we will begin disabling EWS on all M365 tenants worldwide. EWS Applications that have not been migrated will stop functioning.
The following applications on your tenant use EWS: Entra Application ID fef95295-5986-cc3e-1f1f-572b2f8f6bac, fc8eaab8-e298-47b7-9d2c-abc7f33137af, 00b263e4-3497-4650-b082-3197cfdfdd7c, c55d6177-918e-4745-96d3-1715194bc7e8, 6287b600-88b1-45ce-9e56-4fab9fc07d0b, d2ed0387-a4af-4db0-8d20-8819eeb0b3bc Next Steps Review your application portfolio now to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors.to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors. Prioritize EWS app modernization on your engineering schedule to ensure enough time to address any functionality gaps Disable EWS in your tenant when you no longer have applications that depend on it. We know there are certain parity gaps in Graph API but based on EWS usage telemetry we know that the vast majority of EWS applications can already be safely migrated to Graph API. We encourage you to take the next step and begin the modernization process. Refer to Deprecation of Exchange Web Services in Exchange Online for up-to-date guidance and roadmap information. We also provide a set of open-source tools and tutorials to aid in discovery, analysis and AI assisted modernization of EWS applications. We will publish regular communications as we progress towards this deadline to aid affected tenants in identifying EWS usage. We encourage all customers to monitor Message Center and the Exchange Blog and Deprecation of Exchange Web Services in Exchange Online for related content. Thank you in advance for updating and opening your apps to a wider range of useful and intelligent features on Microsoft Graph. We are extremely excited about the growing opportunities that Microsoft Graph offers to developers, and we remain fully committed to our journey to empower developers to access Microsoft 365 data with the most modern features and tools. |
| 2025-11-13 | MC How Affect | In October 2026 we will begin disabling EWS on all M365 tenants worldwide. EWS Applications that have not been migrated will stop functioning.
The following applications on your tenant use EWS: Entra Application ID fef95295-5986-cc3e-1f1f-572b2f8f6bac, fc8eaab8-e298-47b7-9d2c-abc7f33137af, 00b263e4-3497-4650-b082-3197cfdfdd7c, c55d6177-918e-4745-96d3-1715194bc7e8, 6287b600-88b1-45ce-9e56-4fab9fc07d0b, d2ed0387-a4af-4db0-8d20-8819eeb0b3bc Next Steps Review your application portfolio now to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors.to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors. Prioritize EWS app modernization on your engineering schedule to ensure enough time to address any functionality gaps Disable EWS in your tenant when you no longer have applications that depend on it. We know there are certain parity gaps in Graph API but based on EWS usage telemetry we know that the vast majority of EWS applications can already be safely migrated to Graph API. We encourage you to take the next step and begin the modernization process. Refer to Deprecation of Exchange Web Services in Exchange Online for up-to-date guidance and roadmap information. We also provide a set of open-source tools and tutorials to aid in discovery, analysis and AI assisted modernization of EWS applications. We will publish regular communications as we progress towards this deadline to aid affected tenants in identifying EWS usage. We encourage all customers to monitor Message Center and the Exchange Blog and Deprecation of Exchange Web Services in Exchange Online for related content. Thank you in advance for updating and opening your apps to a wider range of useful and intelligent features on Microsoft Graph. We are extremely excited about the growing opportunities that Microsoft Graph offers to developers, and we remain fully committed to our journey to empower developers to access Microsoft 365 data with the most modern features and tools. | In October 2026 we will begin disabling EWS on all M365 tenants worldwide. EWS Applications that have not been migrated will stop functioning.
The following applications on your tenant use EWS: Entra Application ID 6009f132-f149-4391-a1a6-478bc65b1b36 Next Steps Review your application portfolio now to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors.to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors. Prioritize EWS app modernization on your engineering schedule to ensure enough time to address any functionality gaps Disable EWS in your tenant when you no longer have applications that depend on it. We know there are certain parity gaps in Graph API but based on EWS usage telemetry we know that the vast majority of EWS applications can already be safely migrated to Graph API. We encourage you to take the next step and begin the modernization process. Refer to Deprecation of Exchange Web Services in Exchange Online for up-to-date guidance and roadmap information. We also provide a set of open-source tools and tutorials to aid in discovery, analysis and AI assisted modernization of EWS applications. We will publish regular communications as we progress towards this deadline to aid affected tenants in identifying EWS usage. We encourage all customers to monitor Message Center and the Exchange Blog and Deprecation of Exchange Web Services in Exchange Online for related content. Thank you in advance for updating and opening your apps to a wider range of useful and intelligent features on Microsoft Graph. We are extremely excited about the growing opportunities that Microsoft Graph offers to developers, and we remain fully committed to our journey to empower developers to access Microsoft 365 data with the most modern features and tools. |
| 2025-11-13 | MC How Affect | In October 2026 we will begin disabling EWS on all M365 tenants worldwide. EWS Applications that have not been migrated will stop functioning.
The following applications on your tenant use EWS: Entra Application ID 6009f132-f149-4391-a1a6-478bc65b1b36 Next Steps Review your application portfolio now to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors.to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors. Prioritize EWS app modernization on your engineering schedule to ensure enough time to address any functionality gaps Disable EWS in your tenant when you no longer have applications that depend on it. We know there are certain parity gaps in Graph API but based on EWS usage telemetry we know that the vast majority of EWS applications can already be safely migrated to Graph API. We encourage you to take the next step and begin the modernization process. Refer to Deprecation of Exchange Web Services in Exchange Online for up-to-date guidance and roadmap information. We also provide a set of open-source tools and tutorials to aid in discovery, analysis and AI assisted modernization of EWS applications. We will publish regular communications as we progress towards this deadline to aid affected tenants in identifying EWS usage. We encourage all customers to monitor Message Center and the Exchange Blog and Deprecation of Exchange Web Services in Exchange Online for related content. Thank you in advance for updating and opening your apps to a wider range of useful and intelligent features on Microsoft Graph. We are extremely excited about the growing opportunities that Microsoft Graph offers to developers, and we remain fully committed to our journey to empower developers to access Microsoft 365 data with the most modern features and tools. | In October 2026 we will begin disabling EWS on all M365 tenants worldwide. EWS Applications that have not been migrated will stop functioning.
The following applications on your tenant use EWS: Entra Application ID fef95295-5986-cc3e-1f1f-572b2f8f6bac, fc8eaab8-e298-47b7-9d2c-abc7f33137af, 00b263e4-3497-4650-b082-3197cfdfdd7c, c55d6177-918e-4745-96d3-1715194bc7e8, 6287b600-88b1-45ce-9e56-4fab9fc07d0b, d2ed0387-a4af-4db0-8d20-8819eeb0b3bc Next Steps Review your application portfolio now to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors.to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors. Prioritize EWS app modernization on your engineering schedule to ensure enough time to address any functionality gaps Disable EWS in your tenant when you no longer have applications that depend on it. We know there are certain parity gaps in Graph API but based on EWS usage telemetry we know that the vast majority of EWS applications can already be safely migrated to Graph API. We encourage you to take the next step and begin the modernization process. Refer to Deprecation of Exchange Web Services in Exchange Online for up-to-date guidance and roadmap information. We also provide a set of open-source tools and tutorials to aid in discovery, analysis and AI assisted modernization of EWS applications. We will publish regular communications as we progress towards this deadline to aid affected tenants in identifying EWS usage. We encourage all customers to monitor Message Center and the Exchange Blog and Deprecation of Exchange Web Services in Exchange Online for related content. Thank you in advance for updating and opening your apps to a wider range of useful and intelligent features on Microsoft Graph. We are extremely excited about the growing opportunities that Microsoft Graph offers to developers, and we remain fully committed to our journey to empower developers to access Microsoft 365 data with the most modern features and tools. |
| 2025-11-12 | MC How Affect | In October 2026 we will begin disabling EWS on all M365 tenants worldwide. EWS Applications that have not been migrated will stop functioning.
The following applications on your tenant use EWS: Entra Application ID fef95295-5986-cc3e-1f1f-572b2f8f6bac, fc8eaab8-e298-47b7-9d2c-abc7f33137af, 00b263e4-3497-4650-b082-3197cfdfdd7c, c55d6177-918e-4745-96d3-1715194bc7e8, 6287b600-88b1-45ce-9e56-4fab9fc07d0b, d2ed0387-a4af-4db0-8d20-8819eeb0b3bc Next Steps Review your application portfolio now to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors.to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors. Prioritize EWS app modernization on your engineering schedule to ensure enough time to address any functionality gaps Disable EWS in your tenant when you no longer have applications that depend on it. We know there are certain parity gaps in Graph API but based on EWS usage telemetry we know that the vast majority of EWS applications can already be safely migrated to Graph API. We encourage you to take the next step and begin the modernization process. Refer to Deprecation of Exchange Web Services in Exchange Online for up-to-date guidance and roadmap information. We also provide a set of open-source tools and tutorials to aid in discovery, analysis and AI assisted modernization of EWS applications. We will publish regular communications as we progress towards this deadline to aid affected tenants in identifying EWS usage. We encourage all customers to monitor Message Center and the Exchange Blog and Deprecation of Exchange Web Services in Exchange Online for related content. Thank you in advance for updating and opening your apps to a wider range of useful and intelligent features on Microsoft Graph. We are extremely excited about the growing opportunities that Microsoft Graph offers to developers, and we remain fully committed to our journey to empower developers to access Microsoft 365 data with the most modern features and tools. | In October 2026 we will begin disabling EWS on all M365 tenants worldwide. EWS Applications that have not been migrated will stop functioning.
The following applications on your tenant use EWS: Entra Application ID 6009f132-f149-4391-a1a6-478bc65b1b36 Next Steps Review your application portfolio now to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors.to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors. Prioritize EWS app modernization on your engineering schedule to ensure enough time to address any functionality gaps Disable EWS in your tenant when you no longer have applications that depend on it. We know there are certain parity gaps in Graph API but based on EWS usage telemetry we know that the vast majority of EWS applications can already be safely migrated to Graph API. We encourage you to take the next step and begin the modernization process. Refer to Deprecation of Exchange Web Services in Exchange Online for up-to-date guidance and roadmap information. We also provide a set of open-source tools and tutorials to aid in discovery, analysis and AI assisted modernization of EWS applications. We will publish regular communications as we progress towards this deadline to aid affected tenants in identifying EWS usage. We encourage all customers to monitor Message Center and the Exchange Blog and Deprecation of Exchange Web Services in Exchange Online for related content. Thank you in advance for updating and opening your apps to a wider range of useful and intelligent features on Microsoft Graph. We are extremely excited about the growing opportunities that Microsoft Graph offers to developers, and we remain fully committed to our journey to empower developers to access Microsoft 365 data with the most modern features and tools. |
| 2025-11-11 | MC How Affect | In October 2026 we will begin disabling EWS on all M365 tenants worldwide. EWS Applications that have not been migrated will stop functioning.
The following applications on your tenant use EWS: Entra Application ID 6009f132-f149-4391-a1a6-478bc65b1b36 Next Steps Review your application portfolio now to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors.to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors. Prioritize EWS app modernization on your engineering schedule to ensure enough time to address any functionality gaps Disable EWS in your tenant when you no longer have applications that depend on it. We know there are certain parity gaps in Graph API but based on EWS usage telemetry we know that the vast majority of EWS applications can already be safely migrated to Graph API. We encourage you to take the next step and begin the modernization process. Refer to Deprecation of Exchange Web Services in Exchange Online for up-to-date guidance and roadmap information. We also provide a set of open-source tools and tutorials to aid in discovery, analysis and AI assisted modernization of EWS applications. We will publish regular communications as we progress towards this deadline to aid affected tenants in identifying EWS usage. We encourage all customers to monitor Message Center and the Exchange Blog and Deprecation of Exchange Web Services in Exchange Online for related content. Thank you in advance for updating and opening your apps to a wider range of useful and intelligent features on Microsoft Graph. We are extremely excited about the growing opportunities that Microsoft Graph offers to developers, and we remain fully committed to our journey to empower developers to access Microsoft 365 data with the most modern features and tools. | In October 2026 we will begin disabling EWS on all M365 tenants worldwide. EWS Applications that have not been migrated will stop functioning.
The following applications on your tenant use EWS: Entra Application ID fef95295-5986-cc3e-1f1f-572b2f8f6bac, fc8eaab8-e298-47b7-9d2c-abc7f33137af, 00b263e4-3497-4650-b082-3197cfdfdd7c, c55d6177-918e-4745-96d3-1715194bc7e8, 6287b600-88b1-45ce-9e56-4fab9fc07d0b, d2ed0387-a4af-4db0-8d20-8819eeb0b3bc Next Steps Review your application portfolio now to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors.to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors. Prioritize EWS app modernization on your engineering schedule to ensure enough time to address any functionality gaps Disable EWS in your tenant when you no longer have applications that depend on it. We know there are certain parity gaps in Graph API but based on EWS usage telemetry we know that the vast majority of EWS applications can already be safely migrated to Graph API. We encourage you to take the next step and begin the modernization process. Refer to Deprecation of Exchange Web Services in Exchange Online for up-to-date guidance and roadmap information. We also provide a set of open-source tools and tutorials to aid in discovery, analysis and AI assisted modernization of EWS applications. We will publish regular communications as we progress towards this deadline to aid affected tenants in identifying EWS usage. We encourage all customers to monitor Message Center and the Exchange Blog and Deprecation of Exchange Web Services in Exchange Online for related content. Thank you in advance for updating and opening your apps to a wider range of useful and intelligent features on Microsoft Graph. We are extremely excited about the growing opportunities that Microsoft Graph offers to developers, and we remain fully committed to our journey to empower developers to access Microsoft 365 data with the most modern features and tools. |
| 2025-11-11 | MC How Affect | In October 2026 we will begin disabling EWS on all M365 tenants worldwide. EWS Applications that have not been migrated will stop functioning.
The following applications on your tenant use EWS: Entra Application ID fef95295-5986-cc3e-1f1f-572b2f8f6bac, fc8eaab8-e298-47b7-9d2c-abc7f33137af, 00b263e4-3497-4650-b082-3197cfdfdd7c, c55d6177-918e-4745-96d3-1715194bc7e8, 6287b600-88b1-45ce-9e56-4fab9fc07d0b, d2ed0387-a4af-4db0-8d20-8819eeb0b3bc Next Steps Review your application portfolio now to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors.to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors. Prioritize EWS app modernization on your engineering schedule to ensure enough time to address any functionality gaps Disable EWS in your tenant when you no longer have applications that depend on it. We know there are certain parity gaps in Graph API but based on EWS usage telemetry we know that the vast majority of EWS applications can already be safely migrated to Graph API. We encourage you to take the next step and begin the modernization process. Refer to Deprecation of Exchange Web Services in Exchange Online for up-to-date guidance and roadmap information. We also provide a set of open-source tools and tutorials to aid in discovery, analysis and AI assisted modernization of EWS applications. We will publish regular communications as we progress towards this deadline to aid affected tenants in identifying EWS usage. We encourage all customers to monitor Message Center and the Exchange Blog and Deprecation of Exchange Web Services in Exchange Online for related content. Thank you in advance for updating and opening your apps to a wider range of useful and intelligent features on Microsoft Graph. We are extremely excited about the growing opportunities that Microsoft Graph offers to developers, and we remain fully committed to our journey to empower developers to access Microsoft 365 data with the most modern features and tools. | In October 2026 we will begin disabling EWS on all M365 tenants worldwide. EWS Applications that have not been migrated will stop functioning.
The following applications on your tenant use EWS: Entra Application ID 6009f132-f149-4391-a1a6-478bc65b1b36 Next Steps Review your application portfolio now to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors.to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors. Prioritize EWS app modernization on your engineering schedule to ensure enough time to address any functionality gaps Disable EWS in your tenant when you no longer have applications that depend on it. We know there are certain parity gaps in Graph API but based on EWS usage telemetry we know that the vast majority of EWS applications can already be safely migrated to Graph API. We encourage you to take the next step and begin the modernization process. Refer to Deprecation of Exchange Web Services in Exchange Online for up-to-date guidance and roadmap information. We also provide a set of open-source tools and tutorials to aid in discovery, analysis and AI assisted modernization of EWS applications. We will publish regular communications as we progress towards this deadline to aid affected tenants in identifying EWS usage. We encourage all customers to monitor Message Center and the Exchange Blog and Deprecation of Exchange Web Services in Exchange Online for related content. Thank you in advance for updating and opening your apps to a wider range of useful and intelligent features on Microsoft Graph. We are extremely excited about the growing opportunities that Microsoft Graph offers to developers, and we remain fully committed to our journey to empower developers to access Microsoft 365 data with the most modern features and tools. |
| 2025-11-11 | MC How Affect | In October 2026 we will begin disabling EWS on all M365 tenants worldwide. EWS Applications that have not been migrated will stop functioning.
The following applications on your tenant use EWS: Entra Application ID 6009f132-f149-4391-a1a6-478bc65b1b36 Next Steps Review your application portfolio now to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors.to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors. Prioritize EWS app modernization on your engineering schedule to ensure enough time to address any functionality gaps Disable EWS in your tenant when you no longer have applications that depend on it. We know there are certain parity gaps in Graph API but based on EWS usage telemetry we know that the vast majority of EWS applications can already be safely migrated to Graph API. We encourage you to take the next step and begin the modernization process. Refer to Deprecation of Exchange Web Services in Exchange Online for up-to-date guidance and roadmap information. We also provide a set of open-source tools and tutorials to aid in discovery, analysis and AI assisted modernization of EWS applications. We will publish regular communications as we progress towards this deadline to aid affected tenants in identifying EWS usage. We encourage all customers to monitor Message Center and the Exchange Blog and Deprecation of Exchange Web Services in Exchange Online for related content. Thank you in advance for updating and opening your apps to a wider range of useful and intelligent features on Microsoft Graph. We are extremely excited about the growing opportunities that Microsoft Graph offers to developers, and we remain fully committed to our journey to empower developers to access Microsoft 365 data with the most modern features and tools. | In October 2026 we will begin disabling EWS on all M365 tenants worldwide. EWS Applications that have not been migrated will stop functioning.
The following applications on your tenant use EWS: Entra Application ID fef95295-5986-cc3e-1f1f-572b2f8f6bac, fc8eaab8-e298-47b7-9d2c-abc7f33137af, 00b263e4-3497-4650-b082-3197cfdfdd7c, c55d6177-918e-4745-96d3-1715194bc7e8, 6287b600-88b1-45ce-9e56-4fab9fc07d0b, d2ed0387-a4af-4db0-8d20-8819eeb0b3bc Next Steps Review your application portfolio now to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors.to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors. Prioritize EWS app modernization on your engineering schedule to ensure enough time to address any functionality gaps Disable EWS in your tenant when you no longer have applications that depend on it. We know there are certain parity gaps in Graph API but based on EWS usage telemetry we know that the vast majority of EWS applications can already be safely migrated to Graph API. We encourage you to take the next step and begin the modernization process. Refer to Deprecation of Exchange Web Services in Exchange Online for up-to-date guidance and roadmap information. We also provide a set of open-source tools and tutorials to aid in discovery, analysis and AI assisted modernization of EWS applications. We will publish regular communications as we progress towards this deadline to aid affected tenants in identifying EWS usage. We encourage all customers to monitor Message Center and the Exchange Blog and Deprecation of Exchange Web Services in Exchange Online for related content. Thank you in advance for updating and opening your apps to a wider range of useful and intelligent features on Microsoft Graph. We are extremely excited about the growing opportunities that Microsoft Graph offers to developers, and we remain fully committed to our journey to empower developers to access Microsoft 365 data with the most modern features and tools. |
| 2025-11-11 | MC How Affect | In October 2026 we will begin disabling EWS on all M365 tenants worldwide. EWS Applications that have not been migrated will stop functioning.
The following applications on your tenant use EWS: Entra Application ID fef95295-5986-cc3e-1f1f-572b2f8f6bac, fc8eaab8-e298-47b7-9d2c-abc7f33137af, 00b263e4-3497-4650-b082-3197cfdfdd7c, c55d6177-918e-4745-96d3-1715194bc7e8, 6287b600-88b1-45ce-9e56-4fab9fc07d0b, d2ed0387-a4af-4db0-8d20-8819eeb0b3bc Next Steps Review your application portfolio now to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors.to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors. Prioritize EWS app modernization on your engineering schedule to ensure enough time to address any functionality gaps Disable EWS in your tenant when you no longer have applications that depend on it. We know there are certain parity gaps in Graph API but based on EWS usage telemetry we know that the vast majority of EWS applications can already be safely migrated to Graph API. We encourage you to take the next step and begin the modernization process. Refer to Deprecation of Exchange Web Services in Exchange Online for up-to-date guidance and roadmap information. We also provide a set of open-source tools and tutorials to aid in discovery, analysis and AI assisted modernization of EWS applications. We will publish regular communications as we progress towards this deadline to aid affected tenants in identifying EWS usage. We encourage all customers to monitor Message Center and the Exchange Blog and Deprecation of Exchange Web Services in Exchange Online for related content. Thank you in advance for updating and opening your apps to a wider range of useful and intelligent features on Microsoft Graph. We are extremely excited about the growing opportunities that Microsoft Graph offers to developers, and we remain fully committed to our journey to empower developers to access Microsoft 365 data with the most modern features and tools. | In October 2026 we will begin disabling EWS on all M365 tenants worldwide. EWS Applications that have not been migrated will stop functioning.
The following applications on your tenant use EWS: Entra Application ID 6009f132-f149-4391-a1a6-478bc65b1b36 Next Steps Review your application portfolio now to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors.to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors. Prioritize EWS app modernization on your engineering schedule to ensure enough time to address any functionality gaps Disable EWS in your tenant when you no longer have applications that depend on it. We know there are certain parity gaps in Graph API but based on EWS usage telemetry we know that the vast majority of EWS applications can already be safely migrated to Graph API. We encourage you to take the next step and begin the modernization process. Refer to Deprecation of Exchange Web Services in Exchange Online for up-to-date guidance and roadmap information. We also provide a set of open-source tools and tutorials to aid in discovery, analysis and AI assisted modernization of EWS applications. We will publish regular communications as we progress towards this deadline to aid affected tenants in identifying EWS usage. We encourage all customers to monitor Message Center and the Exchange Blog and Deprecation of Exchange Web Services in Exchange Online for related content. Thank you in advance for updating and opening your apps to a wider range of useful and intelligent features on Microsoft Graph. We are extremely excited about the growing opportunities that Microsoft Graph offers to developers, and we remain fully committed to our journey to empower developers to access Microsoft 365 data with the most modern features and tools. |
| 2025-11-08 | MC How Affect | In October 2026 we will begin disabling EWS on all M365 tenants worldwide. EWS Applications that have not been migrated will stop functioning.
The following applications on your tenant use EWS: Entra Application ID 6009f132-f149-4391-a1a6-478bc65b1b36 Next Steps Review your application portfolio now to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors.to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors. Prioritize EWS app modernization on your engineering schedule to ensure enough time to address any functionality gaps Disable EWS in your tenant when you no longer have applications that depend on it. We know there are certain parity gaps in Graph API but based on EWS usage telemetry we know that the vast majority of EWS applications can already be safely migrated to Graph API. We encourage you to take the next step and begin the modernization process. Refer to Deprecation of Exchange Web Services in Exchange Online for up-to-date guidance and roadmap information. We also provide a set of open-source tools and tutorials to aid in discovery, analysis and AI assisted modernization of EWS applications. We will publish regular communications as we progress towards this deadline to aid affected tenants in identifying EWS usage. We encourage all customers to monitor Message Center and the Exchange Blog and Deprecation of Exchange Web Services in Exchange Online for related content. Thank you in advance for updating and opening your apps to a wider range of useful and intelligent features on Microsoft Graph. We are extremely excited about the growing opportunities that Microsoft Graph offers to developers, and we remain fully committed to our journey to empower developers to access Microsoft 365 data with the most modern features and tools. | In October 2026 we will begin disabling EWS on all M365 tenants worldwide. EWS Applications that have not been migrated will stop functioning.
The following applications on your tenant use EWS: Entra Application ID fef95295-5986-cc3e-1f1f-572b2f8f6bac, fc8eaab8-e298-47b7-9d2c-abc7f33137af, 00b263e4-3497-4650-b082-3197cfdfdd7c, c55d6177-918e-4745-96d3-1715194bc7e8, 6287b600-88b1-45ce-9e56-4fab9fc07d0b, d2ed0387-a4af-4db0-8d20-8819eeb0b3bc Next Steps Review your application portfolio now to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors.to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors. Prioritize EWS app modernization on your engineering schedule to ensure enough time to address any functionality gaps Disable EWS in your tenant when you no longer have applications that depend on it. We know there are certain parity gaps in Graph API but based on EWS usage telemetry we know that the vast majority of EWS applications can already be safely migrated to Graph API. We encourage you to take the next step and begin the modernization process. Refer to Deprecation of Exchange Web Services in Exchange Online for up-to-date guidance and roadmap information. We also provide a set of open-source tools and tutorials to aid in discovery, analysis and AI assisted modernization of EWS applications. We will publish regular communications as we progress towards this deadline to aid affected tenants in identifying EWS usage. We encourage all customers to monitor Message Center and the Exchange Blog and Deprecation of Exchange Web Services in Exchange Online for related content. Thank you in advance for updating and opening your apps to a wider range of useful and intelligent features on Microsoft Graph. We are extremely excited about the growing opportunities that Microsoft Graph offers to developers, and we remain fully committed to our journey to empower developers to access Microsoft 365 data with the most modern features and tools. |
| 2025-11-08 | MC How Affect | In October 2026 we will begin disabling EWS on all M365 tenants worldwide. EWS Applications that have not been migrated will stop functioning.
The following applications on your tenant use EWS: Entra Application ID fef95295-5986-cc3e-1f1f-572b2f8f6bac, fc8eaab8-e298-47b7-9d2c-abc7f33137af, 00b263e4-3497-4650-b082-3197cfdfdd7c, c55d6177-918e-4745-96d3-1715194bc7e8, 6287b600-88b1-45ce-9e56-4fab9fc07d0b, d2ed0387-a4af-4db0-8d20-8819eeb0b3bc Next Steps Review your application portfolio now to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors.to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors. Prioritize EWS app modernization on your engineering schedule to ensure enough time to address any functionality gaps Disable EWS in your tenant when you no longer have applications that depend on it. We know there are certain parity gaps in Graph API but based on EWS usage telemetry we know that the vast majority of EWS applications can already be safely migrated to Graph API. We encourage you to take the next step and begin the modernization process. Refer to Deprecation of Exchange Web Services in Exchange Online for up-to-date guidance and roadmap information. We also provide a set of open-source tools and tutorials to aid in discovery, analysis and AI assisted modernization of EWS applications. We will publish regular communications as we progress towards this deadline to aid affected tenants in identifying EWS usage. We encourage all customers to monitor Message Center and the Exchange Blog and Deprecation of Exchange Web Services in Exchange Online for related content. Thank you in advance for updating and opening your apps to a wider range of useful and intelligent features on Microsoft Graph. We are extremely excited about the growing opportunities that Microsoft Graph offers to developers, and we remain fully committed to our journey to empower developers to access Microsoft 365 data with the most modern features and tools. | In October 2026 we will begin disabling EWS on all M365 tenants worldwide. EWS Applications that have not been migrated will stop functioning.
The following applications on your tenant use EWS: Entra Application ID 6009f132-f149-4391-a1a6-478bc65b1b36 Next Steps Review your application portfolio now to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors.to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors. Prioritize EWS app modernization on your engineering schedule to ensure enough time to address any functionality gaps Disable EWS in your tenant when you no longer have applications that depend on it. We know there are certain parity gaps in Graph API but based on EWS usage telemetry we know that the vast majority of EWS applications can already be safely migrated to Graph API. We encourage you to take the next step and begin the modernization process. Refer to Deprecation of Exchange Web Services in Exchange Online for up-to-date guidance and roadmap information. We also provide a set of open-source tools and tutorials to aid in discovery, analysis and AI assisted modernization of EWS applications. We will publish regular communications as we progress towards this deadline to aid affected tenants in identifying EWS usage. We encourage all customers to monitor Message Center and the Exchange Blog and Deprecation of Exchange Web Services in Exchange Online for related content. Thank you in advance for updating and opening your apps to a wider range of useful and intelligent features on Microsoft Graph. We are extremely excited about the growing opportunities that Microsoft Graph offers to developers, and we remain fully committed to our journey to empower developers to access Microsoft 365 data with the most modern features and tools. |
| 2025-11-07 | MC How Affect | In October 2026 we will begin disabling EWS on all M365 tenants worldwide. EWS Applications that have not been migrated will stop functioning.
The following applications on your tenant use EWS: Entra Application ID 6009f132-f149-4391-a1a6-478bc65b1b36 Next Steps Review your application portfolio now to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors.to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors. Prioritize EWS app modernization on your engineering schedule to ensure enough time to address any functionality gaps Disable EWS in your tenant when you no longer have applications that depend on it. We know there are certain parity gaps in Graph API but based on EWS usage telemetry we know that the vast majority of EWS applications can already be safely migrated to Graph API. We encourage you to take the next step and begin the modernization process. Refer to Deprecation of Exchange Web Services in Exchange Online for up-to-date guidance and roadmap information. We also provide a set of open-source tools and tutorials to aid in discovery, analysis and AI assisted modernization of EWS applications. We will publish regular communications as we progress towards this deadline to aid affected tenants in identifying EWS usage. We encourage all customers to monitor Message Center and the Exchange Blog and Deprecation of Exchange Web Services in Exchange Online for related content. Thank you in advance for updating and opening your apps to a wider range of useful and intelligent features on Microsoft Graph. We are extremely excited about the growing opportunities that Microsoft Graph offers to developers, and we remain fully committed to our journey to empower developers to access Microsoft 365 data with the most modern features and tools. | In October 2026 we will begin disabling EWS on all M365 tenants worldwide. EWS Applications that have not been migrated will stop functioning.
The following applications on your tenant use EWS: Entra Application ID fef95295-5986-cc3e-1f1f-572b2f8f6bac, fc8eaab8-e298-47b7-9d2c-abc7f33137af, 00b263e4-3497-4650-b082-3197cfdfdd7c, c55d6177-918e-4745-96d3-1715194bc7e8, 6287b600-88b1-45ce-9e56-4fab9fc07d0b, d2ed0387-a4af-4db0-8d20-8819eeb0b3bc Next Steps Review your application portfolio now to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors.to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors. Prioritize EWS app modernization on your engineering schedule to ensure enough time to address any functionality gaps Disable EWS in your tenant when you no longer have applications that depend on it. We know there are certain parity gaps in Graph API but based on EWS usage telemetry we know that the vast majority of EWS applications can already be safely migrated to Graph API. We encourage you to take the next step and begin the modernization process. Refer to Deprecation of Exchange Web Services in Exchange Online for up-to-date guidance and roadmap information. We also provide a set of open-source tools and tutorials to aid in discovery, analysis and AI assisted modernization of EWS applications. We will publish regular communications as we progress towards this deadline to aid affected tenants in identifying EWS usage. We encourage all customers to monitor Message Center and the Exchange Blog and Deprecation of Exchange Web Services in Exchange Online for related content. Thank you in advance for updating and opening your apps to a wider range of useful and intelligent features on Microsoft Graph. We are extremely excited about the growing opportunities that Microsoft Graph offers to developers, and we remain fully committed to our journey to empower developers to access Microsoft 365 data with the most modern features and tools. |
| 2025-11-07 | MC How Affect | In October 2026 we will begin disabling EWS on all M365 tenants worldwide. EWS Applications that have not been migrated will stop functioning.
The following applications on your tenant use EWS: Entra Application ID fef95295-5986-cc3e-1f1f-572b2f8f6bac, fc8eaab8-e298-47b7-9d2c-abc7f33137af, 00b263e4-3497-4650-b082-3197cfdfdd7c, c55d6177-918e-4745-96d3-1715194bc7e8, 6287b600-88b1-45ce-9e56-4fab9fc07d0b, d2ed0387-a4af-4db0-8d20-8819eeb0b3bc Next Steps Review your application portfolio now to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors.to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors. Prioritize EWS app modernization on your engineering schedule to ensure enough time to address any functionality gaps Disable EWS in your tenant when you no longer have applications that depend on it. We know there are certain parity gaps in Graph API but based on EWS usage telemetry we know that the vast majority of EWS applications can already be safely migrated to Graph API. We encourage you to take the next step and begin the modernization process. Refer to Deprecation of Exchange Web Services in Exchange Online for up-to-date guidance and roadmap information. We also provide a set of open-source tools and tutorials to aid in discovery, analysis and AI assisted modernization of EWS applications. We will publish regular communications as we progress towards this deadline to aid affected tenants in identifying EWS usage. We encourage all customers to monitor Message Center and the Exchange Blog and Deprecation of Exchange Web Services in Exchange Online for related content. Thank you in advance for updating and opening your apps to a wider range of useful and intelligent features on Microsoft Graph. We are extremely excited about the growing opportunities that Microsoft Graph offers to developers, and we remain fully committed to our journey to empower developers to access Microsoft 365 data with the most modern features and tools. | In October 2026 we will begin disabling EWS on all M365 tenants worldwide. EWS Applications that have not been migrated will stop functioning.
The following applications on your tenant use EWS: Entra Application ID 6009f132-f149-4391-a1a6-478bc65b1b36 Next Steps Review your application portfolio now to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors.to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors. Prioritize EWS app modernization on your engineering schedule to ensure enough time to address any functionality gaps Disable EWS in your tenant when you no longer have applications that depend on it. We know there are certain parity gaps in Graph API but based on EWS usage telemetry we know that the vast majority of EWS applications can already be safely migrated to Graph API. We encourage you to take the next step and begin the modernization process. Refer to Deprecation of Exchange Web Services in Exchange Online for up-to-date guidance and roadmap information. We also provide a set of open-source tools and tutorials to aid in discovery, analysis and AI assisted modernization of EWS applications. We will publish regular communications as we progress towards this deadline to aid affected tenants in identifying EWS usage. We encourage all customers to monitor Message Center and the Exchange Blog and Deprecation of Exchange Web Services in Exchange Online for related content. Thank you in advance for updating and opening your apps to a wider range of useful and intelligent features on Microsoft Graph. We are extremely excited about the growing opportunities that Microsoft Graph offers to developers, and we remain fully committed to our journey to empower developers to access Microsoft 365 data with the most modern features and tools. |
| 2025-11-07 | MC How Affect | In October 2026 we will begin disabling EWS on all M365 tenants worldwide. EWS Applications that have not been migrated will stop functioning.
The following applications on your tenant use EWS: Entra Application ID 6009f132-f149-4391-a1a6-478bc65b1b36 Next Steps Review your application portfolio now to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors.to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors. Prioritize EWS app modernization on your engineering schedule to ensure enough time to address any functionality gaps Disable EWS in your tenant when you no longer have applications that depend on it. We know there are certain parity gaps in Graph API but based on EWS usage telemetry we know that the vast majority of EWS applications can already be safely migrated to Graph API. We encourage you to take the next step and begin the modernization process. Refer to Deprecation of Exchange Web Services in Exchange Online for up-to-date guidance and roadmap information. We also provide a set of open-source tools and tutorials to aid in discovery, analysis and AI assisted modernization of EWS applications. We will publish regular communications as we progress towards this deadline to aid affected tenants in identifying EWS usage. We encourage all customers to monitor Message Center and the Exchange Blog and Deprecation of Exchange Web Services in Exchange Online for related content. Thank you in advance for updating and opening your apps to a wider range of useful and intelligent features on Microsoft Graph. We are extremely excited about the growing opportunities that Microsoft Graph offers to developers, and we remain fully committed to our journey to empower developers to access Microsoft 365 data with the most modern features and tools. | In October 2026 we will begin disabling EWS on all M365 tenants worldwide. EWS Applications that have not been migrated will stop functioning.
The following applications on your tenant use EWS: Entra Application ID fef95295-5986-cc3e-1f1f-572b2f8f6bac, fc8eaab8-e298-47b7-9d2c-abc7f33137af, 00b263e4-3497-4650-b082-3197cfdfdd7c, c55d6177-918e-4745-96d3-1715194bc7e8, 6287b600-88b1-45ce-9e56-4fab9fc07d0b, d2ed0387-a4af-4db0-8d20-8819eeb0b3bc Next Steps Review your application portfolio now to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors.to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors. Prioritize EWS app modernization on your engineering schedule to ensure enough time to address any functionality gaps Disable EWS in your tenant when you no longer have applications that depend on it. We know there are certain parity gaps in Graph API but based on EWS usage telemetry we know that the vast majority of EWS applications can already be safely migrated to Graph API. We encourage you to take the next step and begin the modernization process. Refer to Deprecation of Exchange Web Services in Exchange Online for up-to-date guidance and roadmap information. We also provide a set of open-source tools and tutorials to aid in discovery, analysis and AI assisted modernization of EWS applications. We will publish regular communications as we progress towards this deadline to aid affected tenants in identifying EWS usage. We encourage all customers to monitor Message Center and the Exchange Blog and Deprecation of Exchange Web Services in Exchange Online for related content. Thank you in advance for updating and opening your apps to a wider range of useful and intelligent features on Microsoft Graph. We are extremely excited about the growing opportunities that Microsoft Graph offers to developers, and we remain fully committed to our journey to empower developers to access Microsoft 365 data with the most modern features and tools. |
| 2025-11-07 | MC How Affect | In October 2026 we will begin disabling EWS on all M365 tenants worldwide. EWS Applications that have not been migrated will stop functioning.
The following applications on your tenant use EWS: Entra Application ID fef95295-5986-cc3e-1f1f-572b2f8f6bac, fc8eaab8-e298-47b7-9d2c-abc7f33137af, 00b263e4-3497-4650-b082-3197cfdfdd7c, c55d6177-918e-4745-96d3-1715194bc7e8, 6287b600-88b1-45ce-9e56-4fab9fc07d0b, d2ed0387-a4af-4db0-8d20-8819eeb0b3bc Next Steps Review your application portfolio now to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors.to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors. Prioritize EWS app modernization on your engineering schedule to ensure enough time to address any functionality gaps Disable EWS in your tenant when you no longer have applications that depend on it. We know there are certain parity gaps in Graph API but based on EWS usage telemetry we know that the vast majority of EWS applications can already be safely migrated to Graph API. We encourage you to take the next step and begin the modernization process. Refer to Deprecation of Exchange Web Services in Exchange Online for up-to-date guidance and roadmap information. We also provide a set of open-source tools and tutorials to aid in discovery, analysis and AI assisted modernization of EWS applications. We will publish regular communications as we progress towards this deadline to aid affected tenants in identifying EWS usage. We encourage all customers to monitor Message Center and the Exchange Blog and Deprecation of Exchange Web Services in Exchange Online for related content. Thank you in advance for updating and opening your apps to a wider range of useful and intelligent features on Microsoft Graph. We are extremely excited about the growing opportunities that Microsoft Graph offers to developers, and we remain fully committed to our journey to empower developers to access Microsoft 365 data with the most modern features and tools. | In October 2026 we will begin disabling EWS on all M365 tenants worldwide. EWS Applications that have not been migrated will stop functioning.
The following applications on your tenant use EWS: Entra Application ID 6009f132-f149-4391-a1a6-478bc65b1b36 Next Steps Review your application portfolio now to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors.to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors. Prioritize EWS app modernization on your engineering schedule to ensure enough time to address any functionality gaps Disable EWS in your tenant when you no longer have applications that depend on it. We know there are certain parity gaps in Graph API but based on EWS usage telemetry we know that the vast majority of EWS applications can already be safely migrated to Graph API. We encourage you to take the next step and begin the modernization process. Refer to Deprecation of Exchange Web Services in Exchange Online for up-to-date guidance and roadmap information. We also provide a set of open-source tools and tutorials to aid in discovery, analysis and AI assisted modernization of EWS applications. We will publish regular communications as we progress towards this deadline to aid affected tenants in identifying EWS usage. We encourage all customers to monitor Message Center and the Exchange Blog and Deprecation of Exchange Web Services in Exchange Online for related content. Thank you in advance for updating and opening your apps to a wider range of useful and intelligent features on Microsoft Graph. We are extremely excited about the growing opportunities that Microsoft Graph offers to developers, and we remain fully committed to our journey to empower developers to access Microsoft 365 data with the most modern features and tools. |
| 2025-11-06 | MC How Affect | In October 2026 we will begin disabling EWS on all M365 tenants worldwide. EWS Applications that have not been migrated will stop functioning.
The following applications on your tenant use EWS: Entra Application ID 6009f132-f149-4391-a1a6-478bc65b1b36 Next Steps Review your application portfolio now to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors.to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors. Prioritize EWS app modernization on your engineering schedule to ensure enough time to address any functionality gaps Disable EWS in your tenant when you no longer have applications that depend on it. We know there are certain parity gaps in Graph API but based on EWS usage telemetry we know that the vast majority of EWS applications can already be safely migrated to Graph API. We encourage you to take the next step and begin the modernization process. Refer to Deprecation of Exchange Web Services in Exchange Online for up-to-date guidance and roadmap information. We also provide a set of open-source tools and tutorials to aid in discovery, analysis and AI assisted modernization of EWS applications. We will publish regular communications as we progress towards this deadline to aid affected tenants in identifying EWS usage. We encourage all customers to monitor Message Center and the Exchange Blog and Deprecation of Exchange Web Services in Exchange Online for related content. Thank you in advance for updating and opening your apps to a wider range of useful and intelligent features on Microsoft Graph. We are extremely excited about the growing opportunities that Microsoft Graph offers to developers, and we remain fully committed to our journey to empower developers to access Microsoft 365 data with the most modern features and tools. | In October 2026 we will begin disabling EWS on all M365 tenants worldwide. EWS Applications that have not been migrated will stop functioning.
The following applications on your tenant use EWS: Entra Application ID fef95295-5986-cc3e-1f1f-572b2f8f6bac, fc8eaab8-e298-47b7-9d2c-abc7f33137af, 00b263e4-3497-4650-b082-3197cfdfdd7c, c55d6177-918e-4745-96d3-1715194bc7e8, 6287b600-88b1-45ce-9e56-4fab9fc07d0b, d2ed0387-a4af-4db0-8d20-8819eeb0b3bc Next Steps Review your application portfolio now to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors.to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors. Prioritize EWS app modernization on your engineering schedule to ensure enough time to address any functionality gaps Disable EWS in your tenant when you no longer have applications that depend on it. We know there are certain parity gaps in Graph API but based on EWS usage telemetry we know that the vast majority of EWS applications can already be safely migrated to Graph API. We encourage you to take the next step and begin the modernization process. Refer to Deprecation of Exchange Web Services in Exchange Online for up-to-date guidance and roadmap information. We also provide a set of open-source tools and tutorials to aid in discovery, analysis and AI assisted modernization of EWS applications. We will publish regular communications as we progress towards this deadline to aid affected tenants in identifying EWS usage. We encourage all customers to monitor Message Center and the Exchange Blog and Deprecation of Exchange Web Services in Exchange Online for related content. Thank you in advance for updating and opening your apps to a wider range of useful and intelligent features on Microsoft Graph. We are extremely excited about the growing opportunities that Microsoft Graph offers to developers, and we remain fully committed to our journey to empower developers to access Microsoft 365 data with the most modern features and tools. |
| 2025-11-05 | MC How Affect | In October 2026 we will begin disabling EWS on all M365 tenants worldwide. EWS Applications that have not been migrated will stop functioning.
The following applications on your tenant use EWS: Entra Application ID fef95295-5986-cc3e-1f1f-572b2f8f6bac, fc8eaab8-e298-47b7-9d2c-abc7f33137af, 00b263e4-3497-4650-b082-3197cfdfdd7c, c55d6177-918e-4745-96d3-1715194bc7e8, 6287b600-88b1-45ce-9e56-4fab9fc07d0b, d2ed0387-a4af-4db0-8d20-8819eeb0b3bc Next Steps Review your application portfolio now to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors.to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors. Prioritize EWS app modernization on your engineering schedule to ensure enough time to address any functionality gaps Disable EWS in your tenant when you no longer have applications that depend on it. We know there are certain parity gaps in Graph API but based on EWS usage telemetry we know that the vast majority of EWS applications can already be safely migrated to Graph API. We encourage you to take the next step and begin the modernization process. Refer to Deprecation of Exchange Web Services in Exchange Online for up-to-date guidance and roadmap information. We also provide a set of open-source tools and tutorials to aid in discovery, analysis and AI assisted modernization of EWS applications. We will publish regular communications as we progress towards this deadline to aid affected tenants in identifying EWS usage. We encourage all customers to monitor Message Center and the Exchange Blog and Deprecation of Exchange Web Services in Exchange Online for related content. Thank you in advance for updating and opening your apps to a wider range of useful and intelligent features on Microsoft Graph. We are extremely excited about the growing opportunities that Microsoft Graph offers to developers, and we remain fully committed to our journey to empower developers to access Microsoft 365 data with the most modern features and tools. | In October 2026 we will begin disabling EWS on all M365 tenants worldwide. EWS Applications that have not been migrated will stop functioning.
The following applications on your tenant use EWS: Entra Application ID 6009f132-f149-4391-a1a6-478bc65b1b36 Next Steps Review your application portfolio now to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors.to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors. Prioritize EWS app modernization on your engineering schedule to ensure enough time to address any functionality gaps Disable EWS in your tenant when you no longer have applications that depend on it. We know there are certain parity gaps in Graph API but based on EWS usage telemetry we know that the vast majority of EWS applications can already be safely migrated to Graph API. We encourage you to take the next step and begin the modernization process. Refer to Deprecation of Exchange Web Services in Exchange Online for up-to-date guidance and roadmap information. We also provide a set of open-source tools and tutorials to aid in discovery, analysis and AI assisted modernization of EWS applications. We will publish regular communications as we progress towards this deadline to aid affected tenants in identifying EWS usage. We encourage all customers to monitor Message Center and the Exchange Blog and Deprecation of Exchange Web Services in Exchange Online for related content. Thank you in advance for updating and opening your apps to a wider range of useful and intelligent features on Microsoft Graph. We are extremely excited about the growing opportunities that Microsoft Graph offers to developers, and we remain fully committed to our journey to empower developers to access Microsoft 365 data with the most modern features and tools. |
| 2025-11-05 | MC How Affect | In October 2026 we will begin disabling EWS on all M365 tenants worldwide. EWS Applications that have not been migrated will stop functioning.
The following applications on your tenant use EWS: Entra Application ID 6009f132-f149-4391-a1a6-478bc65b1b36 Next Steps Review your application portfolio now to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors.to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors. Prioritize EWS app modernization on your engineering schedule to ensure enough time to address any functionality gaps Disable EWS in your tenant when you no longer have applications that depend on it. We know there are certain parity gaps in Graph API but based on EWS usage telemetry we know that the vast majority of EWS applications can already be safely migrated to Graph API. We encourage you to take the next step and begin the modernization process. Refer to Deprecation of Exchange Web Services in Exchange Online for up-to-date guidance and roadmap information. We also provide a set of open-source tools and tutorials to aid in discovery, analysis and AI assisted modernization of EWS applications. We will publish regular communications as we progress towards this deadline to aid affected tenants in identifying EWS usage. We encourage all customers to monitor Message Center and the Exchange Blog and Deprecation of Exchange Web Services in Exchange Online for related content. Thank you in advance for updating and opening your apps to a wider range of useful and intelligent features on Microsoft Graph. We are extremely excited about the growing opportunities that Microsoft Graph offers to developers, and we remain fully committed to our journey to empower developers to access Microsoft 365 data with the most modern features and tools. | In October 2026 we will begin disabling EWS on all M365 tenants worldwide. EWS Applications that have not been migrated will stop functioning.
The following applications on your tenant use EWS: Entra Application ID fef95295-5986-cc3e-1f1f-572b2f8f6bac, fc8eaab8-e298-47b7-9d2c-abc7f33137af, 00b263e4-3497-4650-b082-3197cfdfdd7c, c55d6177-918e-4745-96d3-1715194bc7e8, 6287b600-88b1-45ce-9e56-4fab9fc07d0b, d2ed0387-a4af-4db0-8d20-8819eeb0b3bc Next Steps Review your application portfolio now to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors.to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors. Prioritize EWS app modernization on your engineering schedule to ensure enough time to address any functionality gaps Disable EWS in your tenant when you no longer have applications that depend on it. We know there are certain parity gaps in Graph API but based on EWS usage telemetry we know that the vast majority of EWS applications can already be safely migrated to Graph API. We encourage you to take the next step and begin the modernization process. Refer to Deprecation of Exchange Web Services in Exchange Online for up-to-date guidance and roadmap information. We also provide a set of open-source tools and tutorials to aid in discovery, analysis and AI assisted modernization of EWS applications. We will publish regular communications as we progress towards this deadline to aid affected tenants in identifying EWS usage. We encourage all customers to monitor Message Center and the Exchange Blog and Deprecation of Exchange Web Services in Exchange Online for related content. Thank you in advance for updating and opening your apps to a wider range of useful and intelligent features on Microsoft Graph. We are extremely excited about the growing opportunities that Microsoft Graph offers to developers, and we remain fully committed to our journey to empower developers to access Microsoft 365 data with the most modern features and tools. |
| 2025-11-05 | MC How Affect | In October 2026 we will begin disabling EWS on all M365 tenants worldwide. EWS Applications that have not been migrated will stop functioning.
The following applications on your tenant use EWS: Entra Application ID fef95295-5986-cc3e-1f1f-572b2f8f6bac, fc8eaab8-e298-47b7-9d2c-abc7f33137af, 00b263e4-3497-4650-b082-3197cfdfdd7c, c55d6177-918e-4745-96d3-1715194bc7e8, 6287b600-88b1-45ce-9e56-4fab9fc07d0b, d2ed0387-a4af-4db0-8d20-8819eeb0b3bc Next Steps Review your application portfolio now to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors.to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors. Prioritize EWS app modernization on your engineering schedule to ensure enough time to address any functionality gaps Disable EWS in your tenant when you no longer have applications that depend on it. We know there are certain parity gaps in Graph API but based on EWS usage telemetry we know that the vast majority of EWS applications can already be safely migrated to Graph API. We encourage you to take the next step and begin the modernization process. Refer to Deprecation of Exchange Web Services in Exchange Online for up-to-date guidance and roadmap information. We also provide a set of open-source tools and tutorials to aid in discovery, analysis and AI assisted modernization of EWS applications. We will publish regular communications as we progress towards this deadline to aid affected tenants in identifying EWS usage. We encourage all customers to monitor Message Center and the Exchange Blog and Deprecation of Exchange Web Services in Exchange Online for related content. Thank you in advance for updating and opening your apps to a wider range of useful and intelligent features on Microsoft Graph. We are extremely excited about the growing opportunities that Microsoft Graph offers to developers, and we remain fully committed to our journey to empower developers to access Microsoft 365 data with the most modern features and tools. | In October 2026 we will begin disabling EWS on all M365 tenants worldwide. EWS Applications that have not been migrated will stop functioning.
The following applications on your tenant use EWS: Entra Application ID 6009f132-f149-4391-a1a6-478bc65b1b36 Next Steps Review your application portfolio now to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors.to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors. Prioritize EWS app modernization on your engineering schedule to ensure enough time to address any functionality gaps Disable EWS in your tenant when you no longer have applications that depend on it. We know there are certain parity gaps in Graph API but based on EWS usage telemetry we know that the vast majority of EWS applications can already be safely migrated to Graph API. We encourage you to take the next step and begin the modernization process. Refer to Deprecation of Exchange Web Services in Exchange Online for up-to-date guidance and roadmap information. We also provide a set of open-source tools and tutorials to aid in discovery, analysis and AI assisted modernization of EWS applications. We will publish regular communications as we progress towards this deadline to aid affected tenants in identifying EWS usage. We encourage all customers to monitor Message Center and the Exchange Blog and Deprecation of Exchange Web Services in Exchange Online for related content. Thank you in advance for updating and opening your apps to a wider range of useful and intelligent features on Microsoft Graph. We are extremely excited about the growing opportunities that Microsoft Graph offers to developers, and we remain fully committed to our journey to empower developers to access Microsoft 365 data with the most modern features and tools. |
| 2025-11-04 | MC How Affect | In October 2026 we will begin disabling EWS on all M365 tenants worldwide. EWS Applications that have not been migrated will stop functioning.
The following applications on your tenant use EWS: Entra Application ID 6009f132-f149-4391-a1a6-478bc65b1b36 Next Steps Review your application portfolio now to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors.to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors. Prioritize EWS app modernization on your engineering schedule to ensure enough time to address any functionality gaps Disable EWS in your tenant when you no longer have applications that depend on it. We know there are certain parity gaps in Graph API but based on EWS usage telemetry we know that the vast majority of EWS applications can already be safely migrated to Graph API. We encourage you to take the next step and begin the modernization process. Refer to Deprecation of Exchange Web Services in Exchange Online for up-to-date guidance and roadmap information. We also provide a set of open-source tools and tutorials to aid in discovery, analysis and AI assisted modernization of EWS applications. We will publish regular communications as we progress towards this deadline to aid affected tenants in identifying EWS usage. We encourage all customers to monitor Message Center and the Exchange Blog and Deprecation of Exchange Web Services in Exchange Online for related content. Thank you in advance for updating and opening your apps to a wider range of useful and intelligent features on Microsoft Graph. We are extremely excited about the growing opportunities that Microsoft Graph offers to developers, and we remain fully committed to our journey to empower developers to access Microsoft 365 data with the most modern features and tools. | In October 2026 we will begin disabling EWS on all M365 tenants worldwide. EWS Applications that have not been migrated will stop functioning.
The following applications on your tenant use EWS: Entra Application ID fef95295-5986-cc3e-1f1f-572b2f8f6bac, fc8eaab8-e298-47b7-9d2c-abc7f33137af, 00b263e4-3497-4650-b082-3197cfdfdd7c, c55d6177-918e-4745-96d3-1715194bc7e8, 6287b600-88b1-45ce-9e56-4fab9fc07d0b, d2ed0387-a4af-4db0-8d20-8819eeb0b3bc Next Steps Review your application portfolio now to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors.to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors. Prioritize EWS app modernization on your engineering schedule to ensure enough time to address any functionality gaps Disable EWS in your tenant when you no longer have applications that depend on it. We know there are certain parity gaps in Graph API but based on EWS usage telemetry we know that the vast majority of EWS applications can already be safely migrated to Graph API. We encourage you to take the next step and begin the modernization process. Refer to Deprecation of Exchange Web Services in Exchange Online for up-to-date guidance and roadmap information. We also provide a set of open-source tools and tutorials to aid in discovery, analysis and AI assisted modernization of EWS applications. We will publish regular communications as we progress towards this deadline to aid affected tenants in identifying EWS usage. We encourage all customers to monitor Message Center and the Exchange Blog and Deprecation of Exchange Web Services in Exchange Online for related content. Thank you in advance for updating and opening your apps to a wider range of useful and intelligent features on Microsoft Graph. We are extremely excited about the growing opportunities that Microsoft Graph offers to developers, and we remain fully committed to our journey to empower developers to access Microsoft 365 data with the most modern features and tools. |
| 2025-11-04 | MC How Affect | In October 2026 we will begin disabling EWS on all M365 tenants worldwide. EWS Applications that have not been migrated will stop functioning.
The following applications on your tenant use EWS: Entra Application ID fef95295-5986-cc3e-1f1f-572b2f8f6bac, fc8eaab8-e298-47b7-9d2c-abc7f33137af, 00b263e4-3497-4650-b082-3197cfdfdd7c, c55d6177-918e-4745-96d3-1715194bc7e8, 6287b600-88b1-45ce-9e56-4fab9fc07d0b, d2ed0387-a4af-4db0-8d20-8819eeb0b3bc Next Steps Review your application portfolio now to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors.to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors. Prioritize EWS app modernization on your engineering schedule to ensure enough time to address any functionality gaps Disable EWS in your tenant when you no longer have applications that depend on it. We know there are certain parity gaps in Graph API but based on EWS usage telemetry we know that the vast majority of EWS applications can already be safely migrated to Graph API. We encourage you to take the next step and begin the modernization process. Refer to Deprecation of Exchange Web Services in Exchange Online for up-to-date guidance and roadmap information. We also provide a set of open-source tools and tutorials to aid in discovery, analysis and AI assisted modernization of EWS applications. We will publish regular communications as we progress towards this deadline to aid affected tenants in identifying EWS usage. We encourage all customers to monitor Message Center and the Exchange Blog and Deprecation of Exchange Web Services in Exchange Online for related content. Thank you in advance for updating and opening your apps to a wider range of useful and intelligent features on Microsoft Graph. We are extremely excited about the growing opportunities that Microsoft Graph offers to developers, and we remain fully committed to our journey to empower developers to access Microsoft 365 data with the most modern features and tools. | In October 2026 we will begin disabling EWS on all M365 tenants worldwide. EWS Applications that have not been migrated will stop functioning.
The following applications on your tenant use EWS: Entra Application ID 6009f132-f149-4391-a1a6-478bc65b1b36 Next Steps Review your application portfolio now to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors.to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors. Prioritize EWS app modernization on your engineering schedule to ensure enough time to address any functionality gaps Disable EWS in your tenant when you no longer have applications that depend on it. We know there are certain parity gaps in Graph API but based on EWS usage telemetry we know that the vast majority of EWS applications can already be safely migrated to Graph API. We encourage you to take the next step and begin the modernization process. Refer to Deprecation of Exchange Web Services in Exchange Online for up-to-date guidance and roadmap information. We also provide a set of open-source tools and tutorials to aid in discovery, analysis and AI assisted modernization of EWS applications. We will publish regular communications as we progress towards this deadline to aid affected tenants in identifying EWS usage. We encourage all customers to monitor Message Center and the Exchange Blog and Deprecation of Exchange Web Services in Exchange Online for related content. Thank you in advance for updating and opening your apps to a wider range of useful and intelligent features on Microsoft Graph. We are extremely excited about the growing opportunities that Microsoft Graph offers to developers, and we remain fully committed to our journey to empower developers to access Microsoft 365 data with the most modern features and tools. |
| 2025-11-04 | MC How Affect | In October 2026 we will begin disabling EWS on all M365 tenants worldwide. EWS Applications that have not been migrated will stop functioning.
The following applications on your tenant use EWS: Entra Application ID 6009f132-f149-4391-a1a6-478bc65b1b36 Next Steps Review your application portfolio now to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors.to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors. Prioritize EWS app modernization on your engineering schedule to ensure enough time to address any functionality gaps Disable EWS in your tenant when you no longer have applications that depend on it. We know there are certain parity gaps in Graph API but based on EWS usage telemetry we know that the vast majority of EWS applications can already be safely migrated to Graph API. We encourage you to take the next step and begin the modernization process. Refer to Deprecation of Exchange Web Services in Exchange Online for up-to-date guidance and roadmap information. We also provide a set of open-source tools and tutorials to aid in discovery, analysis and AI assisted modernization of EWS applications. We will publish regular communications as we progress towards this deadline to aid affected tenants in identifying EWS usage. We encourage all customers to monitor Message Center and the Exchange Blog and Deprecation of Exchange Web Services in Exchange Online for related content. Thank you in advance for updating and opening your apps to a wider range of useful and intelligent features on Microsoft Graph. We are extremely excited about the growing opportunities that Microsoft Graph offers to developers, and we remain fully committed to our journey to empower developers to access Microsoft 365 data with the most modern features and tools. | In October 2026 we will begin disabling EWS on all M365 tenants worldwide. EWS Applications that have not been migrated will stop functioning.
The following applications on your tenant use EWS: Entra Application ID fef95295-5986-cc3e-1f1f-572b2f8f6bac, fc8eaab8-e298-47b7-9d2c-abc7f33137af, 00b263e4-3497-4650-b082-3197cfdfdd7c, c55d6177-918e-4745-96d3-1715194bc7e8, 6287b600-88b1-45ce-9e56-4fab9fc07d0b, d2ed0387-a4af-4db0-8d20-8819eeb0b3bc Next Steps Review your application portfolio now to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors.to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors. Prioritize EWS app modernization on your engineering schedule to ensure enough time to address any functionality gaps Disable EWS in your tenant when you no longer have applications that depend on it. We know there are certain parity gaps in Graph API but based on EWS usage telemetry we know that the vast majority of EWS applications can already be safely migrated to Graph API. We encourage you to take the next step and begin the modernization process. Refer to Deprecation of Exchange Web Services in Exchange Online for up-to-date guidance and roadmap information. We also provide a set of open-source tools and tutorials to aid in discovery, analysis and AI assisted modernization of EWS applications. We will publish regular communications as we progress towards this deadline to aid affected tenants in identifying EWS usage. We encourage all customers to monitor Message Center and the Exchange Blog and Deprecation of Exchange Web Services in Exchange Online for related content. Thank you in advance for updating and opening your apps to a wider range of useful and intelligent features on Microsoft Graph. We are extremely excited about the growing opportunities that Microsoft Graph offers to developers, and we remain fully committed to our journey to empower developers to access Microsoft 365 data with the most modern features and tools. |
| 2025-11-03 | MC How Affect | In October 2026 we will begin disabling EWS on all M365 tenants worldwide. EWS Applications that have not been migrated will stop functioning.
The following applications on your tenant use EWS: Entra Application ID fef95295-5986-cc3e-1f1f-572b2f8f6bac, fc8eaab8-e298-47b7-9d2c-abc7f33137af, 00b263e4-3497-4650-b082-3197cfdfdd7c, c55d6177-918e-4745-96d3-1715194bc7e8, 6287b600-88b1-45ce-9e56-4fab9fc07d0b, d2ed0387-a4af-4db0-8d20-8819eeb0b3bc Next Steps Review your application portfolio now to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors.to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors. Prioritize EWS app modernization on your engineering schedule to ensure enough time to address any functionality gaps Disable EWS in your tenant when you no longer have applications that depend on it. We know there are certain parity gaps in Graph API but based on EWS usage telemetry we know that the vast majority of EWS applications can already be safely migrated to Graph API. We encourage you to take the next step and begin the modernization process. Refer to Deprecation of Exchange Web Services in Exchange Online for up-to-date guidance and roadmap information. We also provide a set of open-source tools and tutorials to aid in discovery, analysis and AI assisted modernization of EWS applications. We will publish regular communications as we progress towards this deadline to aid affected tenants in identifying EWS usage. We encourage all customers to monitor Message Center and the Exchange Blog and Deprecation of Exchange Web Services in Exchange Online for related content. Thank you in advance for updating and opening your apps to a wider range of useful and intelligent features on Microsoft Graph. We are extremely excited about the growing opportunities that Microsoft Graph offers to developers, and we remain fully committed to our journey to empower developers to access Microsoft 365 data with the most modern features and tools. | In October 2026 we will begin disabling EWS on all M365 tenants worldwide. EWS Applications that have not been migrated will stop functioning.
The following applications on your tenant use EWS: Entra Application ID 6009f132-f149-4391-a1a6-478bc65b1b36 Next Steps Review your application portfolio now to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors.to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors. Prioritize EWS app modernization on your engineering schedule to ensure enough time to address any functionality gaps Disable EWS in your tenant when you no longer have applications that depend on it. We know there are certain parity gaps in Graph API but based on EWS usage telemetry we know that the vast majority of EWS applications can already be safely migrated to Graph API. We encourage you to take the next step and begin the modernization process. Refer to Deprecation of Exchange Web Services in Exchange Online for up-to-date guidance and roadmap information. We also provide a set of open-source tools and tutorials to aid in discovery, analysis and AI assisted modernization of EWS applications. We will publish regular communications as we progress towards this deadline to aid affected tenants in identifying EWS usage. We encourage all customers to monitor Message Center and the Exchange Blog and Deprecation of Exchange Web Services in Exchange Online for related content. Thank you in advance for updating and opening your apps to a wider range of useful and intelligent features on Microsoft Graph. We are extremely excited about the growing opportunities that Microsoft Graph offers to developers, and we remain fully committed to our journey to empower developers to access Microsoft 365 data with the most modern features and tools. |
| 2025-11-03 | MC How Affect | In October 2026 we will begin disabling EWS on all M365 tenants worldwide. EWS Applications that have not been migrated will stop functioning.
The following applications on your tenant use EWS: Entra Application ID 6009f132-f149-4391-a1a6-478bc65b1b36 Next Steps Review your application portfolio now to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors.to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors. Prioritize EWS app modernization on your engineering schedule to ensure enough time to address any functionality gaps Disable EWS in your tenant when you no longer have applications that depend on it. We know there are certain parity gaps in Graph API but based on EWS usage telemetry we know that the vast majority of EWS applications can already be safely migrated to Graph API. We encourage you to take the next step and begin the modernization process. Refer to Deprecation of Exchange Web Services in Exchange Online for up-to-date guidance and roadmap information. We also provide a set of open-source tools and tutorials to aid in discovery, analysis and AI assisted modernization of EWS applications. We will publish regular communications as we progress towards this deadline to aid affected tenants in identifying EWS usage. We encourage all customers to monitor Message Center and the Exchange Blog and Deprecation of Exchange Web Services in Exchange Online for related content. Thank you in advance for updating and opening your apps to a wider range of useful and intelligent features on Microsoft Graph. We are extremely excited about the growing opportunities that Microsoft Graph offers to developers, and we remain fully committed to our journey to empower developers to access Microsoft 365 data with the most modern features and tools. | In October 2026 we will begin disabling EWS on all M365 tenants worldwide. EWS Applications that have not been migrated will stop functioning.
The following applications on your tenant use EWS: Entra Application ID fef95295-5986-cc3e-1f1f-572b2f8f6bac, fc8eaab8-e298-47b7-9d2c-abc7f33137af, 00b263e4-3497-4650-b082-3197cfdfdd7c, c55d6177-918e-4745-96d3-1715194bc7e8, 6287b600-88b1-45ce-9e56-4fab9fc07d0b, d2ed0387-a4af-4db0-8d20-8819eeb0b3bc Next Steps Review your application portfolio now to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors.to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors. Prioritize EWS app modernization on your engineering schedule to ensure enough time to address any functionality gaps Disable EWS in your tenant when you no longer have applications that depend on it. We know there are certain parity gaps in Graph API but based on EWS usage telemetry we know that the vast majority of EWS applications can already be safely migrated to Graph API. We encourage you to take the next step and begin the modernization process. Refer to Deprecation of Exchange Web Services in Exchange Online for up-to-date guidance and roadmap information. We also provide a set of open-source tools and tutorials to aid in discovery, analysis and AI assisted modernization of EWS applications. We will publish regular communications as we progress towards this deadline to aid affected tenants in identifying EWS usage. We encourage all customers to monitor Message Center and the Exchange Blog and Deprecation of Exchange Web Services in Exchange Online for related content. Thank you in advance for updating and opening your apps to a wider range of useful and intelligent features on Microsoft Graph. We are extremely excited about the growing opportunities that Microsoft Graph offers to developers, and we remain fully committed to our journey to empower developers to access Microsoft 365 data with the most modern features and tools. |
| 2025-11-03 | MC How Affect | In October 2026 we will begin disabling EWS on all M365 tenants worldwide. EWS Applications that have not been migrated will stop functioning.
The following applications on your tenant use EWS: Entra Application ID fef95295-5986-cc3e-1f1f-572b2f8f6bac, fc8eaab8-e298-47b7-9d2c-abc7f33137af, 00b263e4-3497-4650-b082-3197cfdfdd7c, c55d6177-918e-4745-96d3-1715194bc7e8, 6287b600-88b1-45ce-9e56-4fab9fc07d0b, d2ed0387-a4af-4db0-8d20-8819eeb0b3bc Next Steps Review your application portfolio now to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors.to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors. Prioritize EWS app modernization on your engineering schedule to ensure enough time to address any functionality gaps Disable EWS in your tenant when you no longer have applications that depend on it. We know there are certain parity gaps in Graph API but based on EWS usage telemetry we know that the vast majority of EWS applications can already be safely migrated to Graph API. We encourage you to take the next step and begin the modernization process. Refer to Deprecation of Exchange Web Services in Exchange Online for up-to-date guidance and roadmap information. We also provide a set of open-source tools and tutorials to aid in discovery, analysis and AI assisted modernization of EWS applications. We will publish regular communications as we progress towards this deadline to aid affected tenants in identifying EWS usage. We encourage all customers to monitor Message Center and the Exchange Blog and Deprecation of Exchange Web Services in Exchange Online for related content. Thank you in advance for updating and opening your apps to a wider range of useful and intelligent features on Microsoft Graph. We are extremely excited about the growing opportunities that Microsoft Graph offers to developers, and we remain fully committed to our journey to empower developers to access Microsoft 365 data with the most modern features and tools. | In October 2026 we will begin disabling EWS on all M365 tenants worldwide. EWS Applications that have not been migrated will stop functioning.
The following applications on your tenant use EWS: Entra Application ID 6009f132-f149-4391-a1a6-478bc65b1b36 Next Steps Review your application portfolio now to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors.to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors. Prioritize EWS app modernization on your engineering schedule to ensure enough time to address any functionality gaps Disable EWS in your tenant when you no longer have applications that depend on it. We know there are certain parity gaps in Graph API but based on EWS usage telemetry we know that the vast majority of EWS applications can already be safely migrated to Graph API. We encourage you to take the next step and begin the modernization process. Refer to Deprecation of Exchange Web Services in Exchange Online for up-to-date guidance and roadmap information. We also provide a set of open-source tools and tutorials to aid in discovery, analysis and AI assisted modernization of EWS applications. We will publish regular communications as we progress towards this deadline to aid affected tenants in identifying EWS usage. We encourage all customers to monitor Message Center and the Exchange Blog and Deprecation of Exchange Web Services in Exchange Online for related content. Thank you in advance for updating and opening your apps to a wider range of useful and intelligent features on Microsoft Graph. We are extremely excited about the growing opportunities that Microsoft Graph offers to developers, and we remain fully committed to our journey to empower developers to access Microsoft 365 data with the most modern features and tools. |
| 2025-11-01 | MC How Affect | In October 2026 we will begin disabling EWS on all M365 tenants worldwide. EWS Applications that have not been migrated will stop functioning.
The following applications on your tenant use EWS: Entra Application ID 6009f132-f149-4391-a1a6-478bc65b1b36 Next Steps Review your application portfolio now to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors.to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors. Prioritize EWS app modernization on your engineering schedule to ensure enough time to address any functionality gaps Disable EWS in your tenant when you no longer have applications that depend on it. We know there are certain parity gaps in Graph API but based on EWS usage telemetry we know that the vast majority of EWS applications can already be safely migrated to Graph API. We encourage you to take the next step and begin the modernization process. Refer to Deprecation of Exchange Web Services in Exchange Online for up-to-date guidance and roadmap information. We also provide a set of open-source tools and tutorials to aid in discovery, analysis and AI assisted modernization of EWS applications. We will publish regular communications as we progress towards this deadline to aid affected tenants in identifying EWS usage. We encourage all customers to monitor Message Center and the Exchange Blog and Deprecation of Exchange Web Services in Exchange Online for related content. Thank you in advance for updating and opening your apps to a wider range of useful and intelligent features on Microsoft Graph. We are extremely excited about the growing opportunities that Microsoft Graph offers to developers, and we remain fully committed to our journey to empower developers to access Microsoft 365 data with the most modern features and tools. | In October 2026 we will begin disabling EWS on all M365 tenants worldwide. EWS Applications that have not been migrated will stop functioning.
The following applications on your tenant use EWS: Entra Application ID fef95295-5986-cc3e-1f1f-572b2f8f6bac, fc8eaab8-e298-47b7-9d2c-abc7f33137af, 00b263e4-3497-4650-b082-3197cfdfdd7c, c55d6177-918e-4745-96d3-1715194bc7e8, 6287b600-88b1-45ce-9e56-4fab9fc07d0b, d2ed0387-a4af-4db0-8d20-8819eeb0b3bc Next Steps Review your application portfolio now to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors.to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors. Prioritize EWS app modernization on your engineering schedule to ensure enough time to address any functionality gaps Disable EWS in your tenant when you no longer have applications that depend on it. We know there are certain parity gaps in Graph API but based on EWS usage telemetry we know that the vast majority of EWS applications can already be safely migrated to Graph API. We encourage you to take the next step and begin the modernization process. Refer to Deprecation of Exchange Web Services in Exchange Online for up-to-date guidance and roadmap information. We also provide a set of open-source tools and tutorials to aid in discovery, analysis and AI assisted modernization of EWS applications. We will publish regular communications as we progress towards this deadline to aid affected tenants in identifying EWS usage. We encourage all customers to monitor Message Center and the Exchange Blog and Deprecation of Exchange Web Services in Exchange Online for related content. Thank you in advance for updating and opening your apps to a wider range of useful and intelligent features on Microsoft Graph. We are extremely excited about the growing opportunities that Microsoft Graph offers to developers, and we remain fully committed to our journey to empower developers to access Microsoft 365 data with the most modern features and tools. |
| 2025-11-01 | MC How Affect | In October 2026 we will begin disabling EWS on all M365 tenants worldwide. EWS Applications that have not been migrated will stop functioning.
The following applications on your tenant use EWS: Entra Application ID fef95295-5986-cc3e-1f1f-572b2f8f6bac, fc8eaab8-e298-47b7-9d2c-abc7f33137af, 00b263e4-3497-4650-b082-3197cfdfdd7c, c55d6177-918e-4745-96d3-1715194bc7e8, 6287b600-88b1-45ce-9e56-4fab9fc07d0b, d2ed0387-a4af-4db0-8d20-8819eeb0b3bc Next Steps Review your application portfolio now to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors.to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors. Prioritize EWS app modernization on your engineering schedule to ensure enough time to address any functionality gaps Disable EWS in your tenant when you no longer have applications that depend on it. We know there are certain parity gaps in Graph API but based on EWS usage telemetry we know that the vast majority of EWS applications can already be safely migrated to Graph API. We encourage you to take the next step and begin the modernization process. Refer to Deprecation of Exchange Web Services in Exchange Online for up-to-date guidance and roadmap information. We also provide a set of open-source tools and tutorials to aid in discovery, analysis and AI assisted modernization of EWS applications. We will publish regular communications as we progress towards this deadline to aid affected tenants in identifying EWS usage. We encourage all customers to monitor Message Center and the Exchange Blog and Deprecation of Exchange Web Services in Exchange Online for related content. Thank you in advance for updating and opening your apps to a wider range of useful and intelligent features on Microsoft Graph. We are extremely excited about the growing opportunities that Microsoft Graph offers to developers, and we remain fully committed to our journey to empower developers to access Microsoft 365 data with the most modern features and tools. | In October 2026 we will begin disabling EWS on all M365 tenants worldwide. EWS Applications that have not been migrated will stop functioning.
The following applications on your tenant use EWS: Entra Application ID 6009f132-f149-4391-a1a6-478bc65b1b36 Next Steps Review your application portfolio now to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors.to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors. Prioritize EWS app modernization on your engineering schedule to ensure enough time to address any functionality gaps Disable EWS in your tenant when you no longer have applications that depend on it. We know there are certain parity gaps in Graph API but based on EWS usage telemetry we know that the vast majority of EWS applications can already be safely migrated to Graph API. We encourage you to take the next step and begin the modernization process. Refer to Deprecation of Exchange Web Services in Exchange Online for up-to-date guidance and roadmap information. We also provide a set of open-source tools and tutorials to aid in discovery, analysis and AI assisted modernization of EWS applications. We will publish regular communications as we progress towards this deadline to aid affected tenants in identifying EWS usage. We encourage all customers to monitor Message Center and the Exchange Blog and Deprecation of Exchange Web Services in Exchange Online for related content. Thank you in advance for updating and opening your apps to a wider range of useful and intelligent features on Microsoft Graph. We are extremely excited about the growing opportunities that Microsoft Graph offers to developers, and we remain fully committed to our journey to empower developers to access Microsoft 365 data with the most modern features and tools. |
| 2025-10-31 | MC How Affect | In October 2026 we will begin disabling EWS on all M365 tenants worldwide. EWS Applications that have not been migrated will stop functioning.
The following applications on your tenant use EWS: Entra Application ID {AppIDs} Next Steps Review your application portfolio now to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors.to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors. Prioritize EWS app modernization on your engineering schedule to ensure enough time to address any functionality gaps Disable EWS in your tenant when you no longer have applications that depend on it. We know there are certain parity gaps in Graph API but based on EWS usage telemetry we know that the vast majority of EWS applications can already be safely migrated to Graph API. We encourage you to take the next step and begin the modernization process. Refer to Deprecation of Exchange Web Services in Exchange Online for up-to-date guidance and roadmap information. We also provide a set of open-source tools and tutorials to aid in discovery, analysis and AI assisted modernization of EWS applications. We will publish regular communications as we progress towards this deadline to aid affected tenants in identifying EWS usage. We encourage all customers to monitor Message Center and the Exchange Blog and Deprecation of Exchange Web Services in Exchange Online for related content. Thank you in advance for updating and opening your apps to a wider range of useful and intelligent features on Microsoft Graph. We are extremely excited about the growing opportunities that Microsoft Graph offers to developers, and we remain fully committed to our journey to empower developers to access Microsoft 365 data with the most modern features and tools. | In October 2026 we will begin disabling EWS on all M365 tenants worldwide. EWS Applications that have not been migrated will stop functioning.
The following applications on your tenant use EWS: Entra Application ID fef95295-5986-cc3e-1f1f-572b2f8f6bac, fc8eaab8-e298-47b7-9d2c-abc7f33137af, 00b263e4-3497-4650-b082-3197cfdfdd7c, c55d6177-918e-4745-96d3-1715194bc7e8, 6287b600-88b1-45ce-9e56-4fab9fc07d0b, d2ed0387-a4af-4db0-8d20-8819eeb0b3bc Next Steps Review your application portfolio now to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors.to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors. Prioritize EWS app modernization on your engineering schedule to ensure enough time to address any functionality gaps Disable EWS in your tenant when you no longer have applications that depend on it. We know there are certain parity gaps in Graph API but based on EWS usage telemetry we know that the vast majority of EWS applications can already be safely migrated to Graph API. We encourage you to take the next step and begin the modernization process. Refer to Deprecation of Exchange Web Services in Exchange Online for up-to-date guidance and roadmap information. We also provide a set of open-source tools and tutorials to aid in discovery, analysis and AI assisted modernization of EWS applications. We will publish regular communications as we progress towards this deadline to aid affected tenants in identifying EWS usage. We encourage all customers to monitor Message Center and the Exchange Blog and Deprecation of Exchange Web Services in Exchange Online for related content. Thank you in advance for updating and opening your apps to a wider range of useful and intelligent features on Microsoft Graph. We are extremely excited about the growing opportunities that Microsoft Graph offers to developers, and we remain fully committed to our journey to empower developers to access Microsoft 365 data with the most modern features and tools. |
| 2025-10-31 | MC How Affect | In October 2026 we will begin disabling EWS on all M365 tenants worldwide. EWS Applications that have not been migrated will stop functioning.
The following applications on your tenant use EWS: Entra Application ID fef95295-5986-cc3e-1f1f-572b2f8f6bac, fc8eaab8-e298-47b7-9d2c-abc7f33137af, 00b263e4-3497-4650-b082-3197cfdfdd7c, c55d6177-918e-4745-96d3-1715194bc7e8, 6287b600-88b1-45ce-9e56-4fab9fc07d0b, d2ed0387-a4af-4db0-8d20-8819eeb0b3bc Next Steps Review your application portfolio now to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors.to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors. Prioritize EWS app modernization on your engineering schedule to ensure enough time to address any functionality gaps Disable EWS in your tenant when you no longer have applications that depend on it. We know there are certain parity gaps in Graph API but based on EWS usage telemetry we know that the vast majority of EWS applications can already be safely migrated to Graph API. We encourage you to take the next step and begin the modernization process. Refer to Deprecation of Exchange Web Services in Exchange Online for up-to-date guidance and roadmap information. We also provide a set of open-source tools and tutorials to aid in discovery, analysis and AI assisted modernization of EWS applications. We will publish regular communications as we progress towards this deadline to aid affected tenants in identifying EWS usage. We encourage all customers to monitor Message Center and the Exchange Blog and Deprecation of Exchange Web Services in Exchange Online for related content. Thank you in advance for updating and opening your apps to a wider range of useful and intelligent features on Microsoft Graph. We are extremely excited about the growing opportunities that Microsoft Graph offers to developers, and we remain fully committed to our journey to empower developers to access Microsoft 365 data with the most modern features and tools. | In October 2026 we will begin disabling EWS on all M365 tenants worldwide. EWS Applications that have not been migrated will stop functioning.
The following applications on your tenant use EWS: Entra Application ID {AppIDs} Next Steps Review your application portfolio now to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors.to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors. Prioritize EWS app modernization on your engineering schedule to ensure enough time to address any functionality gaps Disable EWS in your tenant when you no longer have applications that depend on it. We know there are certain parity gaps in Graph API but based on EWS usage telemetry we know that the vast majority of EWS applications can already be safely migrated to Graph API. We encourage you to take the next step and begin the modernization process. Refer to Deprecation of Exchange Web Services in Exchange Online for up-to-date guidance and roadmap information. We also provide a set of open-source tools and tutorials to aid in discovery, analysis and AI assisted modernization of EWS applications. We will publish regular communications as we progress towards this deadline to aid affected tenants in identifying EWS usage. We encourage all customers to monitor Message Center and the Exchange Blog and Deprecation of Exchange Web Services in Exchange Online for related content. Thank you in advance for updating and opening your apps to a wider range of useful and intelligent features on Microsoft Graph. We are extremely excited about the growing opportunities that Microsoft Graph offers to developers, and we remain fully committed to our journey to empower developers to access Microsoft 365 data with the most modern features and tools. |
| 2025-10-31 | MC How Affect | In October 2026 we will begin disabling EWS on all M365 tenants worldwide. EWS Applications that have not been migrated will stop functioning.
The following applications on your tenant use EWS: Entra Application ID 6009f132-f149-4391-a1a6-478bc65b1b36 Next Steps Review your application portfolio now to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors.to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors. Prioritize EWS app modernization on your engineering schedule to ensure enough time to address any functionality gaps Disable EWS in your tenant when you no longer have applications that depend on it. We know there are certain parity gaps in Graph API but based on EWS usage telemetry we know that the vast majority of EWS applications can already be safely migrated to Graph API. We encourage you to take the next step and begin the modernization process. Refer to Deprecation of Exchange Web Services in Exchange Online for up-to-date guidance and roadmap information. We also provide a set of open-source tools and tutorials to aid in discovery, analysis and AI assisted modernization of EWS applications. We will publish regular communications as we progress towards this deadline to aid affected tenants in identifying EWS usage. We encourage all customers to monitor Message Center and the Exchange Blog and Deprecation of Exchange Web Services in Exchange Online for related content. Thank you in advance for updating and opening your apps to a wider range of useful and intelligent features on Microsoft Graph. We are extremely excited about the growing opportunities that Microsoft Graph offers to developers, and we remain fully committed to our journey to empower developers to access Microsoft 365 data with the most modern features and tools. | In October 2026 we will begin disabling EWS on all M365 tenants worldwide. EWS Applications that have not been migrated will stop functioning.
The following applications on your tenant use EWS: Entra Application ID fef95295-5986-cc3e-1f1f-572b2f8f6bac, fc8eaab8-e298-47b7-9d2c-abc7f33137af, 00b263e4-3497-4650-b082-3197cfdfdd7c, c55d6177-918e-4745-96d3-1715194bc7e8, 6287b600-88b1-45ce-9e56-4fab9fc07d0b, d2ed0387-a4af-4db0-8d20-8819eeb0b3bc Next Steps Review your application portfolio now to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors.to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors. Prioritize EWS app modernization on your engineering schedule to ensure enough time to address any functionality gaps Disable EWS in your tenant when you no longer have applications that depend on it. We know there are certain parity gaps in Graph API but based on EWS usage telemetry we know that the vast majority of EWS applications can already be safely migrated to Graph API. We encourage you to take the next step and begin the modernization process. Refer to Deprecation of Exchange Web Services in Exchange Online for up-to-date guidance and roadmap information. We also provide a set of open-source tools and tutorials to aid in discovery, analysis and AI assisted modernization of EWS applications. We will publish regular communications as we progress towards this deadline to aid affected tenants in identifying EWS usage. We encourage all customers to monitor Message Center and the Exchange Blog and Deprecation of Exchange Web Services in Exchange Online for related content. Thank you in advance for updating and opening your apps to a wider range of useful and intelligent features on Microsoft Graph. We are extremely excited about the growing opportunities that Microsoft Graph offers to developers, and we remain fully committed to our journey to empower developers to access Microsoft 365 data with the most modern features and tools. |
| 2025-10-30 | MC How Affect | In October 2026 we will begin disabling EWS on all M365 tenants worldwide. EWS Applications that have not been migrated will stop functioning.
The following applications on your tenant use EWS: Entra Application ID fef95295-5986-cc3e-1f1f-572b2f8f6bac, fc8eaab8-e298-47b7-9d2c-abc7f33137af, 00b263e4-3497-4650-b082-3197cfdfdd7c, c55d6177-918e-4745-96d3-1715194bc7e8, 6287b600-88b1-45ce-9e56-4fab9fc07d0b, d2ed0387-a4af-4db0-8d20-8819eeb0b3bc Next Steps Review your application portfolio now to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors.to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors. Prioritize EWS app modernization on your engineering schedule to ensure enough time to address any functionality gaps Disable EWS in your tenant when you no longer have applications that depend on it. We know there are certain parity gaps in Graph API but based on EWS usage telemetry we know that the vast majority of EWS applications can already be safely migrated to Graph API. We encourage you to take the next step and begin the modernization process. Refer to Deprecation of Exchange Web Services in Exchange Online for up-to-date guidance and roadmap information. We also provide a set of open-source tools and tutorials to aid in discovery, analysis and AI assisted modernization of EWS applications. We will publish regular communications as we progress towards this deadline to aid affected tenants in identifying EWS usage. We encourage all customers to monitor Message Center and the Exchange Blog and Deprecation of Exchange Web Services in Exchange Online for related content. Thank you in advance for updating and opening your apps to a wider range of useful and intelligent features on Microsoft Graph. We are extremely excited about the growing opportunities that Microsoft Graph offers to developers, and we remain fully committed to our journey to empower developers to access Microsoft 365 data with the most modern features and tools. | In October 2026 we will begin disabling EWS on all M365 tenants worldwide. EWS Applications that have not been migrated will stop functioning.
The following applications on your tenant use EWS: Entra Application ID 6009f132-f149-4391-a1a6-478bc65b1b36 Next Steps Review your application portfolio now to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors.to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors. Prioritize EWS app modernization on your engineering schedule to ensure enough time to address any functionality gaps Disable EWS in your tenant when you no longer have applications that depend on it. We know there are certain parity gaps in Graph API but based on EWS usage telemetry we know that the vast majority of EWS applications can already be safely migrated to Graph API. We encourage you to take the next step and begin the modernization process. Refer to Deprecation of Exchange Web Services in Exchange Online for up-to-date guidance and roadmap information. We also provide a set of open-source tools and tutorials to aid in discovery, analysis and AI assisted modernization of EWS applications. We will publish regular communications as we progress towards this deadline to aid affected tenants in identifying EWS usage. We encourage all customers to monitor Message Center and the Exchange Blog and Deprecation of Exchange Web Services in Exchange Online for related content. Thank you in advance for updating and opening your apps to a wider range of useful and intelligent features on Microsoft Graph. We are extremely excited about the growing opportunities that Microsoft Graph offers to developers, and we remain fully committed to our journey to empower developers to access Microsoft 365 data with the most modern features and tools. |
| 2025-10-30 | MC How Affect | In October 2026 we will begin disabling EWS on all M365 tenants worldwide. EWS Applications that have not been migrated will stop functioning.
The following applications on your tenant use EWS: Entra Application ID 6009f132-f149-4391-a1a6-478bc65b1b36 Next Steps Review your application portfolio now to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors.to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors. Prioritize EWS app modernization on your engineering schedule to ensure enough time to address any functionality gaps Disable EWS in your tenant when you no longer have applications that depend on it. We know there are certain parity gaps in Graph API but based on EWS usage telemetry we know that the vast majority of EWS applications can already be safely migrated to Graph API. We encourage you to take the next step and begin the modernization process. Refer to Deprecation of Exchange Web Services in Exchange Online for up-to-date guidance and roadmap information. We also provide a set of open-source tools and tutorials to aid in discovery, analysis and AI assisted modernization of EWS applications. We will publish regular communications as we progress towards this deadline to aid affected tenants in identifying EWS usage. We encourage all customers to monitor Message Center and the Exchange Blog and Deprecation of Exchange Web Services in Exchange Online for related content. Thank you in advance for updating and opening your apps to a wider range of useful and intelligent features on Microsoft Graph. We are extremely excited about the growing opportunities that Microsoft Graph offers to developers, and we remain fully committed to our journey to empower developers to access Microsoft 365 data with the most modern features and tools. | In October 2026 we will begin disabling EWS on all M365 tenants worldwide. EWS Applications that have not been migrated will stop functioning.
The following applications on your tenant use EWS: Entra Application ID fef95295-5986-cc3e-1f1f-572b2f8f6bac, fc8eaab8-e298-47b7-9d2c-abc7f33137af, 00b263e4-3497-4650-b082-3197cfdfdd7c, c55d6177-918e-4745-96d3-1715194bc7e8, 6287b600-88b1-45ce-9e56-4fab9fc07d0b, d2ed0387-a4af-4db0-8d20-8819eeb0b3bc Next Steps Review your application portfolio now to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors.to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors. Prioritize EWS app modernization on your engineering schedule to ensure enough time to address any functionality gaps Disable EWS in your tenant when you no longer have applications that depend on it. We know there are certain parity gaps in Graph API but based on EWS usage telemetry we know that the vast majority of EWS applications can already be safely migrated to Graph API. We encourage you to take the next step and begin the modernization process. Refer to Deprecation of Exchange Web Services in Exchange Online for up-to-date guidance and roadmap information. We also provide a set of open-source tools and tutorials to aid in discovery, analysis and AI assisted modernization of EWS applications. We will publish regular communications as we progress towards this deadline to aid affected tenants in identifying EWS usage. We encourage all customers to monitor Message Center and the Exchange Blog and Deprecation of Exchange Web Services in Exchange Online for related content. Thank you in advance for updating and opening your apps to a wider range of useful and intelligent features on Microsoft Graph. We are extremely excited about the growing opportunities that Microsoft Graph offers to developers, and we remain fully committed to our journey to empower developers to access Microsoft 365 data with the most modern features and tools. |
| 2025-10-30 | MC How Affect | In October 2026 we will begin disabling EWS on all M365 tenants worldwide. EWS Applications that have not been migrated will stop functioning.
The following applications on your tenant use EWS: Entra Application ID fef95295-5986-cc3e-1f1f-572b2f8f6bac, fc8eaab8-e298-47b7-9d2c-abc7f33137af, 00b263e4-3497-4650-b082-3197cfdfdd7c, c55d6177-918e-4745-96d3-1715194bc7e8, 6287b600-88b1-45ce-9e56-4fab9fc07d0b, d2ed0387-a4af-4db0-8d20-8819eeb0b3bc Next Steps Review your application portfolio now to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors.to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors. Prioritize EWS app modernization on your engineering schedule to ensure enough time to address any functionality gaps Disable EWS in your tenant when you no longer have applications that depend on it. We know there are certain parity gaps in Graph API but based on EWS usage telemetry we know that the vast majority of EWS applications can already be safely migrated to Graph API. We encourage you to take the next step and begin the modernization process. Refer to Deprecation of Exchange Web Services in Exchange Online for up-to-date guidance and roadmap information. We also provide a set of open-source tools and tutorials to aid in discovery, analysis and AI assisted modernization of EWS applications. We will publish regular communications as we progress towards this deadline to aid affected tenants in identifying EWS usage. We encourage all customers to monitor Message Center and the Exchange Blog and Deprecation of Exchange Web Services in Exchange Online for related content. Thank you in advance for updating and opening your apps to a wider range of useful and intelligent features on Microsoft Graph. We are extremely excited about the growing opportunities that Microsoft Graph offers to developers, and we remain fully committed to our journey to empower developers to access Microsoft 365 data with the most modern features and tools. | In October 2026 we will begin disabling EWS on all M365 tenants worldwide. EWS Applications that have not been migrated will stop functioning.
The following applications on your tenant use EWS: Entra Application ID 6009f132-f149-4391-a1a6-478bc65b1b36 Next Steps Review your application portfolio now to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors.to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors. Prioritize EWS app modernization on your engineering schedule to ensure enough time to address any functionality gaps Disable EWS in your tenant when you no longer have applications that depend on it. We know there are certain parity gaps in Graph API but based on EWS usage telemetry we know that the vast majority of EWS applications can already be safely migrated to Graph API. We encourage you to take the next step and begin the modernization process. Refer to Deprecation of Exchange Web Services in Exchange Online for up-to-date guidance and roadmap information. We also provide a set of open-source tools and tutorials to aid in discovery, analysis and AI assisted modernization of EWS applications. We will publish regular communications as we progress towards this deadline to aid affected tenants in identifying EWS usage. We encourage all customers to monitor Message Center and the Exchange Blog and Deprecation of Exchange Web Services in Exchange Online for related content. Thank you in advance for updating and opening your apps to a wider range of useful and intelligent features on Microsoft Graph. We are extremely excited about the growing opportunities that Microsoft Graph offers to developers, and we remain fully committed to our journey to empower developers to access Microsoft 365 data with the most modern features and tools. |
| 2025-10-29 | MC How Affect | In October 2026 we will begin disabling EWS on all M365 tenants worldwide. EWS Applications that have not been migrated will stop functioning.
The following applications on your tenant use EWS: Entra Application ID 6009f132-f149-4391-a1a6-478bc65b1b36 Next Steps Review your application portfolio now to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors.to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors. Prioritize EWS app modernization on your engineering schedule to ensure enough time to address any functionality gaps Disable EWS in your tenant when you no longer have applications that depend on it. We know there are certain parity gaps in Graph API but based on EWS usage telemetry we know that the vast majority of EWS applications can already be safely migrated to Graph API. We encourage you to take the next step and begin the modernization process. Refer to Deprecation of Exchange Web Services in Exchange Online for up-to-date guidance and roadmap information. We also provide a set of open-source tools and tutorials to aid in discovery, analysis and AI assisted modernization of EWS applications. We will publish regular communications as we progress towards this deadline to aid affected tenants in identifying EWS usage. We encourage all customers to monitor Message Center and the Exchange Blog and Deprecation of Exchange Web Services in Exchange Online for related content. Thank you in advance for updating and opening your apps to a wider range of useful and intelligent features on Microsoft Graph. We are extremely excited about the growing opportunities that Microsoft Graph offers to developers, and we remain fully committed to our journey to empower developers to access Microsoft 365 data with the most modern features and tools. | In October 2026 we will begin disabling EWS on all M365 tenants worldwide. EWS Applications that have not been migrated will stop functioning.
The following applications on your tenant use EWS: Entra Application ID fef95295-5986-cc3e-1f1f-572b2f8f6bac, fc8eaab8-e298-47b7-9d2c-abc7f33137af, 00b263e4-3497-4650-b082-3197cfdfdd7c, c55d6177-918e-4745-96d3-1715194bc7e8, 6287b600-88b1-45ce-9e56-4fab9fc07d0b, d2ed0387-a4af-4db0-8d20-8819eeb0b3bc Next Steps Review your application portfolio now to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors.to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors. Prioritize EWS app modernization on your engineering schedule to ensure enough time to address any functionality gaps Disable EWS in your tenant when you no longer have applications that depend on it. We know there are certain parity gaps in Graph API but based on EWS usage telemetry we know that the vast majority of EWS applications can already be safely migrated to Graph API. We encourage you to take the next step and begin the modernization process. Refer to Deprecation of Exchange Web Services in Exchange Online for up-to-date guidance and roadmap information. We also provide a set of open-source tools and tutorials to aid in discovery, analysis and AI assisted modernization of EWS applications. We will publish regular communications as we progress towards this deadline to aid affected tenants in identifying EWS usage. We encourage all customers to monitor Message Center and the Exchange Blog and Deprecation of Exchange Web Services in Exchange Online for related content. Thank you in advance for updating and opening your apps to a wider range of useful and intelligent features on Microsoft Graph. We are extremely excited about the growing opportunities that Microsoft Graph offers to developers, and we remain fully committed to our journey to empower developers to access Microsoft 365 data with the most modern features and tools. |
| 2025-10-28 | MC How Affect | In October 2026 we will begin disabling EWS on all M365 tenants worldwide. EWS Applications that have not been migrated will stop functioning.
The following applications on your tenant use EWS: Entra Application ID fef95295-5986-cc3e-1f1f-572b2f8f6bac, fc8eaab8-e298-47b7-9d2c-abc7f33137af, 00b263e4-3497-4650-b082-3197cfdfdd7c, c55d6177-918e-4745-96d3-1715194bc7e8, 6287b600-88b1-45ce-9e56-4fab9fc07d0b, d2ed0387-a4af-4db0-8d20-8819eeb0b3bc Next Steps Review your application portfolio now to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors.to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors. Prioritize EWS app modernization on your engineering schedule to ensure enough time to address any functionality gaps Disable EWS in your tenant when you no longer have applications that depend on it. We know there are certain parity gaps in Graph API but based on EWS usage telemetry we know that the vast majority of EWS applications can already be safely migrated to Graph API. We encourage you to take the next step and begin the modernization process. Refer to Deprecation of Exchange Web Services in Exchange Online for up-to-date guidance and roadmap information. We also provide a set of open-source tools and tutorials to aid in discovery, analysis and AI assisted modernization of EWS applications. We will publish regular communications as we progress towards this deadline to aid affected tenants in identifying EWS usage. We encourage all customers to monitor Message Center and the Exchange Blog and Deprecation of Exchange Web Services in Exchange Online for related content. Thank you in advance for updating and opening your apps to a wider range of useful and intelligent features on Microsoft Graph. We are extremely excited about the growing opportunities that Microsoft Graph offers to developers, and we remain fully committed to our journey to empower developers to access Microsoft 365 data with the most modern features and tools. | In October 2026 we will begin disabling EWS on all M365 tenants worldwide. EWS Applications that have not been migrated will stop functioning.
The following applications on your tenant use EWS: Entra Application ID 6009f132-f149-4391-a1a6-478bc65b1b36 Next Steps Review your application portfolio now to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors.to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors. Prioritize EWS app modernization on your engineering schedule to ensure enough time to address any functionality gaps Disable EWS in your tenant when you no longer have applications that depend on it. We know there are certain parity gaps in Graph API but based on EWS usage telemetry we know that the vast majority of EWS applications can already be safely migrated to Graph API. We encourage you to take the next step and begin the modernization process. Refer to Deprecation of Exchange Web Services in Exchange Online for up-to-date guidance and roadmap information. We also provide a set of open-source tools and tutorials to aid in discovery, analysis and AI assisted modernization of EWS applications. We will publish regular communications as we progress towards this deadline to aid affected tenants in identifying EWS usage. We encourage all customers to monitor Message Center and the Exchange Blog and Deprecation of Exchange Web Services in Exchange Online for related content. Thank you in advance for updating and opening your apps to a wider range of useful and intelligent features on Microsoft Graph. We are extremely excited about the growing opportunities that Microsoft Graph offers to developers, and we remain fully committed to our journey to empower developers to access Microsoft 365 data with the most modern features and tools. |
| 2025-10-27 | MC How Affect | In October 2026 we will begin disabling EWS on all M365 tenants worldwide. EWS Applications that have not been migrated will stop functioning.
The following applications on your tenant use EWS: Entra Application ID 6009f132-f149-4391-a1a6-478bc65b1b36 Next Steps Review your application portfolio now to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors.to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors. Prioritize EWS app modernization on your engineering schedule to ensure enough time to address any functionality gaps Disable EWS in your tenant when you no longer have applications that depend on it. We know there are certain parity gaps in Graph API but based on EWS usage telemetry we know that the vast majority of EWS applications can already be safely migrated to Graph API. We encourage you to take the next step and begin the modernization process. Refer to Deprecation of Exchange Web Services in Exchange Online for up-to-date guidance and roadmap information. We also provide a set of open-source tools and tutorials to aid in discovery, analysis and AI assisted modernization of EWS applications. We will publish regular communications as we progress towards this deadline to aid affected tenants in identifying EWS usage. We encourage all customers to monitor Message Center and the Exchange Blog and Deprecation of Exchange Web Services in Exchange Online for related content. Thank you in advance for updating and opening your apps to a wider range of useful and intelligent features on Microsoft Graph. We are extremely excited about the growing opportunities that Microsoft Graph offers to developers, and we remain fully committed to our journey to empower developers to access Microsoft 365 data with the most modern features and tools. | In October 2026 we will begin disabling EWS on all M365 tenants worldwide. EWS Applications that have not been migrated will stop functioning.
The following applications on your tenant use EWS: Entra Application ID fef95295-5986-cc3e-1f1f-572b2f8f6bac, fc8eaab8-e298-47b7-9d2c-abc7f33137af, 00b263e4-3497-4650-b082-3197cfdfdd7c, c55d6177-918e-4745-96d3-1715194bc7e8, 6287b600-88b1-45ce-9e56-4fab9fc07d0b, d2ed0387-a4af-4db0-8d20-8819eeb0b3bc Next Steps Review your application portfolio now to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors.to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors. Prioritize EWS app modernization on your engineering schedule to ensure enough time to address any functionality gaps Disable EWS in your tenant when you no longer have applications that depend on it. We know there are certain parity gaps in Graph API but based on EWS usage telemetry we know that the vast majority of EWS applications can already be safely migrated to Graph API. We encourage you to take the next step and begin the modernization process. Refer to Deprecation of Exchange Web Services in Exchange Online for up-to-date guidance and roadmap information. We also provide a set of open-source tools and tutorials to aid in discovery, analysis and AI assisted modernization of EWS applications. We will publish regular communications as we progress towards this deadline to aid affected tenants in identifying EWS usage. We encourage all customers to monitor Message Center and the Exchange Blog and Deprecation of Exchange Web Services in Exchange Online for related content. Thank you in advance for updating and opening your apps to a wider range of useful and intelligent features on Microsoft Graph. We are extremely excited about the growing opportunities that Microsoft Graph offers to developers, and we remain fully committed to our journey to empower developers to access Microsoft 365 data with the most modern features and tools. |
| 2025-10-26 | MC How Affect | In October 2026 we will begin disabling EWS on all M365 tenants worldwide. EWS Applications that have not been migrated will stop functioning.
The following applications on your tenant use EWS: Entra Application ID fef95295-5986-cc3e-1f1f-572b2f8f6bac, fc8eaab8-e298-47b7-9d2c-abc7f33137af, 00b263e4-3497-4650-b082-3197cfdfdd7c, c55d6177-918e-4745-96d3-1715194bc7e8, 6287b600-88b1-45ce-9e56-4fab9fc07d0b, d2ed0387-a4af-4db0-8d20-8819eeb0b3bc Next Steps Review your application portfolio now to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors.to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors. Prioritize EWS app modernization on your engineering schedule to ensure enough time to address any functionality gaps Disable EWS in your tenant when you no longer have applications that depend on it. We know there are certain parity gaps in Graph API but based on EWS usage telemetry we know that the vast majority of EWS applications can already be safely migrated to Graph API. We encourage you to take the next step and begin the modernization process. Refer to Deprecation of Exchange Web Services in Exchange Online for up-to-date guidance and roadmap information. We also provide a set of open-source tools and tutorials to aid in discovery, analysis and AI assisted modernization of EWS applications. We will publish regular communications as we progress towards this deadline to aid affected tenants in identifying EWS usage. We encourage all customers to monitor Message Center and the Exchange Blog and Deprecation of Exchange Web Services in Exchange Online for related content. Thank you in advance for updating and opening your apps to a wider range of useful and intelligent features on Microsoft Graph. We are extremely excited about the growing opportunities that Microsoft Graph offers to developers, and we remain fully committed to our journey to empower developers to access Microsoft 365 data with the most modern features and tools. | In October 2026 we will begin disabling EWS on all M365 tenants worldwide. EWS Applications that have not been migrated will stop functioning.
The following applications on your tenant use EWS: Entra Application ID 6009f132-f149-4391-a1a6-478bc65b1b36 Next Steps Review your application portfolio now to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors.to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors. Prioritize EWS app modernization on your engineering schedule to ensure enough time to address any functionality gaps Disable EWS in your tenant when you no longer have applications that depend on it. We know there are certain parity gaps in Graph API but based on EWS usage telemetry we know that the vast majority of EWS applications can already be safely migrated to Graph API. We encourage you to take the next step and begin the modernization process. Refer to Deprecation of Exchange Web Services in Exchange Online for up-to-date guidance and roadmap information. We also provide a set of open-source tools and tutorials to aid in discovery, analysis and AI assisted modernization of EWS applications. We will publish regular communications as we progress towards this deadline to aid affected tenants in identifying EWS usage. We encourage all customers to monitor Message Center and the Exchange Blog and Deprecation of Exchange Web Services in Exchange Online for related content. Thank you in advance for updating and opening your apps to a wider range of useful and intelligent features on Microsoft Graph. We are extremely excited about the growing opportunities that Microsoft Graph offers to developers, and we remain fully committed to our journey to empower developers to access Microsoft 365 data with the most modern features and tools. |
| 2025-10-25 | MC How Affect | In October 2026 we will begin disabling EWS on all M365 tenants worldwide. EWS Applications that have not been migrated will stop functioning.
The following applications on your tenant use EWS: Entra Application ID 6009f132-f149-4391-a1a6-478bc65b1b36 Next Steps Review your application portfolio now to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors.to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors. Prioritize EWS app modernization on your engineering schedule to ensure enough time to address any functionality gaps Disable EWS in your tenant when you no longer have applications that depend on it. We know there are certain parity gaps in Graph API but based on EWS usage telemetry we know that the vast majority of EWS applications can already be safely migrated to Graph API. We encourage you to take the next step and begin the modernization process. Refer to Deprecation of Exchange Web Services in Exchange Online for up-to-date guidance and roadmap information. We also provide a set of open-source tools and tutorials to aid in discovery, analysis and AI assisted modernization of EWS applications. We will publish regular communications as we progress towards this deadline to aid affected tenants in identifying EWS usage. We encourage all customers to monitor Message Center and the Exchange Blog and Deprecation of Exchange Web Services in Exchange Online for related content. Thank you in advance for updating and opening your apps to a wider range of useful and intelligent features on Microsoft Graph. We are extremely excited about the growing opportunities that Microsoft Graph offers to developers, and we remain fully committed to our journey to empower developers to access Microsoft 365 data with the most modern features and tools. | In October 2026 we will begin disabling EWS on all M365 tenants worldwide. EWS Applications that have not been migrated will stop functioning.
The following applications on your tenant use EWS: Entra Application ID fef95295-5986-cc3e-1f1f-572b2f8f6bac, fc8eaab8-e298-47b7-9d2c-abc7f33137af, 00b263e4-3497-4650-b082-3197cfdfdd7c, c55d6177-918e-4745-96d3-1715194bc7e8, 6287b600-88b1-45ce-9e56-4fab9fc07d0b, d2ed0387-a4af-4db0-8d20-8819eeb0b3bc Next Steps Review your application portfolio now to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors.to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors. Prioritize EWS app modernization on your engineering schedule to ensure enough time to address any functionality gaps Disable EWS in your tenant when you no longer have applications that depend on it. We know there are certain parity gaps in Graph API but based on EWS usage telemetry we know that the vast majority of EWS applications can already be safely migrated to Graph API. We encourage you to take the next step and begin the modernization process. Refer to Deprecation of Exchange Web Services in Exchange Online for up-to-date guidance and roadmap information. We also provide a set of open-source tools and tutorials to aid in discovery, analysis and AI assisted modernization of EWS applications. We will publish regular communications as we progress towards this deadline to aid affected tenants in identifying EWS usage. We encourage all customers to monitor Message Center and the Exchange Blog and Deprecation of Exchange Web Services in Exchange Online for related content. Thank you in advance for updating and opening your apps to a wider range of useful and intelligent features on Microsoft Graph. We are extremely excited about the growing opportunities that Microsoft Graph offers to developers, and we remain fully committed to our journey to empower developers to access Microsoft 365 data with the most modern features and tools. |
| 2025-10-24 | MC How Affect | In October 2026 we will begin disabling EWS on all M365 tenants worldwide. EWS Applications that have not been migrated will stop functioning.
The following applications on your tenant use EWS: Entra Application ID fef95295-5986-cc3e-1f1f-572b2f8f6bac, fc8eaab8-e298-47b7-9d2c-abc7f33137af, 00b263e4-3497-4650-b082-3197cfdfdd7c, c55d6177-918e-4745-96d3-1715194bc7e8, 6287b600-88b1-45ce-9e56-4fab9fc07d0b, d2ed0387-a4af-4db0-8d20-8819eeb0b3bc Next Steps Review your application portfolio now to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors.to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors. Prioritize EWS app modernization on your engineering schedule to ensure enough time to address any functionality gaps Disable EWS in your tenant when you no longer have applications that depend on it. We know there are certain parity gaps in Graph API but based on EWS usage telemetry we know that the vast majority of EWS applications can already be safely migrated to Graph API. We encourage you to take the next step and begin the modernization process. Refer to Deprecation of Exchange Web Services in Exchange Online for up-to-date guidance and roadmap information. We also provide a set of open-source tools and tutorials to aid in discovery, analysis and AI assisted modernization of EWS applications. We will publish regular communications as we progress towards this deadline to aid affected tenants in identifying EWS usage. We encourage all customers to monitor Message Center and the Exchange Blog and Deprecation of Exchange Web Services in Exchange Online for related content. Thank you in advance for updating and opening your apps to a wider range of useful and intelligent features on Microsoft Graph. We are extremely excited about the growing opportunities that Microsoft Graph offers to developers, and we remain fully committed to our journey to empower developers to access Microsoft 365 data with the most modern features and tools. | In October 2026 we will begin disabling EWS on all M365 tenants worldwide. EWS Applications that have not been migrated will stop functioning.
The following applications on your tenant use EWS: Entra Application ID 6009f132-f149-4391-a1a6-478bc65b1b36 Next Steps Review your application portfolio now to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors.to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors. Prioritize EWS app modernization on your engineering schedule to ensure enough time to address any functionality gaps Disable EWS in your tenant when you no longer have applications that depend on it. We know there are certain parity gaps in Graph API but based on EWS usage telemetry we know that the vast majority of EWS applications can already be safely migrated to Graph API. We encourage you to take the next step and begin the modernization process. Refer to Deprecation of Exchange Web Services in Exchange Online for up-to-date guidance and roadmap information. We also provide a set of open-source tools and tutorials to aid in discovery, analysis and AI assisted modernization of EWS applications. We will publish regular communications as we progress towards this deadline to aid affected tenants in identifying EWS usage. We encourage all customers to monitor Message Center and the Exchange Blog and Deprecation of Exchange Web Services in Exchange Online for related content. Thank you in advance for updating and opening your apps to a wider range of useful and intelligent features on Microsoft Graph. We are extremely excited about the growing opportunities that Microsoft Graph offers to developers, and we remain fully committed to our journey to empower developers to access Microsoft 365 data with the most modern features and tools. |
| 2025-10-24 | MC How Affect | In October 2026 we will begin disabling EWS on all M365 tenants worldwide. EWS Applications that have not been migrated will stop functioning.
The following applications on your tenant use EWS: Entra Application ID 6009f132-f149-4391-a1a6-478bc65b1b36 Next Steps Review your application portfolio now to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors.to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors. Prioritize EWS app modernization on your engineering schedule to ensure enough time to address any functionality gaps Disable EWS in your tenant when you no longer have applications that depend on it. We know there are certain parity gaps in Graph API but based on EWS usage telemetry we know that the vast majority of EWS applications can already be safely migrated to Graph API. We encourage you to take the next step and begin the modernization process. Refer to Deprecation of Exchange Web Services in Exchange Online for up-to-date guidance and roadmap information. We also provide a set of open-source tools and tutorials to aid in discovery, analysis and AI assisted modernization of EWS applications. We will publish regular communications as we progress towards this deadline to aid affected tenants in identifying EWS usage. We encourage all customers to monitor Message Center and the Exchange Blog and Deprecation of Exchange Web Services in Exchange Online for related content. Thank you in advance for updating and opening your apps to a wider range of useful and intelligent features on Microsoft Graph. We are extremely excited about the growing opportunities that Microsoft Graph offers to developers, and we remain fully committed to our journey to empower developers to access Microsoft 365 data with the most modern features and tools. | In October 2026 we will begin disabling EWS on all M365 tenants worldwide. EWS Applications that have not been migrated will stop functioning.
The following applications on your tenant use EWS: Entra Application ID fef95295-5986-cc3e-1f1f-572b2f8f6bac, fc8eaab8-e298-47b7-9d2c-abc7f33137af, 00b263e4-3497-4650-b082-3197cfdfdd7c, c55d6177-918e-4745-96d3-1715194bc7e8, 6287b600-88b1-45ce-9e56-4fab9fc07d0b, d2ed0387-a4af-4db0-8d20-8819eeb0b3bc Next Steps Review your application portfolio now to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors.to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors. Prioritize EWS app modernization on your engineering schedule to ensure enough time to address any functionality gaps Disable EWS in your tenant when you no longer have applications that depend on it. We know there are certain parity gaps in Graph API but based on EWS usage telemetry we know that the vast majority of EWS applications can already be safely migrated to Graph API. We encourage you to take the next step and begin the modernization process. Refer to Deprecation of Exchange Web Services in Exchange Online for up-to-date guidance and roadmap information. We also provide a set of open-source tools and tutorials to aid in discovery, analysis and AI assisted modernization of EWS applications. We will publish regular communications as we progress towards this deadline to aid affected tenants in identifying EWS usage. We encourage all customers to monitor Message Center and the Exchange Blog and Deprecation of Exchange Web Services in Exchange Online for related content. Thank you in advance for updating and opening your apps to a wider range of useful and intelligent features on Microsoft Graph. We are extremely excited about the growing opportunities that Microsoft Graph offers to developers, and we remain fully committed to our journey to empower developers to access Microsoft 365 data with the most modern features and tools. |
| 2025-10-24 | MC How Affect | In October 2026 we will begin disabling EWS on all M365 tenants worldwide. EWS Applications that have not been migrated will stop functioning.
The following applications on your tenant use EWS: Entra Application ID fef95295-5986-cc3e-1f1f-572b2f8f6bac, fc8eaab8-e298-47b7-9d2c-abc7f33137af, 00b263e4-3497-4650-b082-3197cfdfdd7c, c55d6177-918e-4745-96d3-1715194bc7e8, 6287b600-88b1-45ce-9e56-4fab9fc07d0b, d2ed0387-a4af-4db0-8d20-8819eeb0b3bc Next Steps Review your application portfolio now to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors.to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors. Prioritize EWS app modernization on your engineering schedule to ensure enough time to address any functionality gaps Disable EWS in your tenant when you no longer have applications that depend on it. We know there are certain parity gaps in Graph API but based on EWS usage telemetry we know that the vast majority of EWS applications can already be safely migrated to Graph API. We encourage you to take the next step and begin the modernization process. Refer to Deprecation of Exchange Web Services in Exchange Online for up-to-date guidance and roadmap information. We also provide a set of open-source tools and tutorials to aid in discovery, analysis and AI assisted modernization of EWS applications. We will publish regular communications as we progress towards this deadline to aid affected tenants in identifying EWS usage. We encourage all customers to monitor Message Center and the Exchange Blog and Deprecation of Exchange Web Services in Exchange Online for related content. Thank you in advance for updating and opening your apps to a wider range of useful and intelligent features on Microsoft Graph. We are extremely excited about the growing opportunities that Microsoft Graph offers to developers, and we remain fully committed to our journey to empower developers to access Microsoft 365 data with the most modern features and tools. | In October 2026 we will begin disabling EWS on all M365 tenants worldwide. EWS Applications that have not been migrated will stop functioning.
The following applications on your tenant use EWS: Entra Application ID 6009f132-f149-4391-a1a6-478bc65b1b36 Next Steps Review your application portfolio now to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors.to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors. Prioritize EWS app modernization on your engineering schedule to ensure enough time to address any functionality gaps Disable EWS in your tenant when you no longer have applications that depend on it. We know there are certain parity gaps in Graph API but based on EWS usage telemetry we know that the vast majority of EWS applications can already be safely migrated to Graph API. We encourage you to take the next step and begin the modernization process. Refer to Deprecation of Exchange Web Services in Exchange Online for up-to-date guidance and roadmap information. We also provide a set of open-source tools and tutorials to aid in discovery, analysis and AI assisted modernization of EWS applications. We will publish regular communications as we progress towards this deadline to aid affected tenants in identifying EWS usage. We encourage all customers to monitor Message Center and the Exchange Blog and Deprecation of Exchange Web Services in Exchange Online for related content. Thank you in advance for updating and opening your apps to a wider range of useful and intelligent features on Microsoft Graph. We are extremely excited about the growing opportunities that Microsoft Graph offers to developers, and we remain fully committed to our journey to empower developers to access Microsoft 365 data with the most modern features and tools. |
| 2025-10-24 | MC How Affect | In October 2026 we will begin disabling EWS on all M365 tenants worldwide. EWS Applications that have not been migrated will stop functioning.
The following applications on your tenant use EWS: Entra Application ID 6009f132-f149-4391-a1a6-478bc65b1b36 Next Steps Review your application portfolio now to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors.to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors. Prioritize EWS app modernization on your engineering schedule to ensure enough time to address any functionality gaps Disable EWS in your tenant when you no longer have applications that depend on it. We know there are certain parity gaps in Graph API but based on EWS usage telemetry we know that the vast majority of EWS applications can already be safely migrated to Graph API. We encourage you to take the next step and begin the modernization process. Refer to Deprecation of Exchange Web Services in Exchange Online for up-to-date guidance and roadmap information. We also provide a set of open-source tools and tutorials to aid in discovery, analysis and AI assisted modernization of EWS applications. We will publish regular communications as we progress towards this deadline to aid affected tenants in identifying EWS usage. We encourage all customers to monitor Message Center and the Exchange Blog and Deprecation of Exchange Web Services in Exchange Online for related content. Thank you in advance for updating and opening your apps to a wider range of useful and intelligent features on Microsoft Graph. We are extremely excited about the growing opportunities that Microsoft Graph offers to developers, and we remain fully committed to our journey to empower developers to access Microsoft 365 data with the most modern features and tools. | In October 2026 we will begin disabling EWS on all M365 tenants worldwide. EWS Applications that have not been migrated will stop functioning.
The following applications on your tenant use EWS: Entra Application ID fef95295-5986-cc3e-1f1f-572b2f8f6bac, fc8eaab8-e298-47b7-9d2c-abc7f33137af, 00b263e4-3497-4650-b082-3197cfdfdd7c, c55d6177-918e-4745-96d3-1715194bc7e8, 6287b600-88b1-45ce-9e56-4fab9fc07d0b, d2ed0387-a4af-4db0-8d20-8819eeb0b3bc Next Steps Review your application portfolio now to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors.to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors. Prioritize EWS app modernization on your engineering schedule to ensure enough time to address any functionality gaps Disable EWS in your tenant when you no longer have applications that depend on it. We know there are certain parity gaps in Graph API but based on EWS usage telemetry we know that the vast majority of EWS applications can already be safely migrated to Graph API. We encourage you to take the next step and begin the modernization process. Refer to Deprecation of Exchange Web Services in Exchange Online for up-to-date guidance and roadmap information. We also provide a set of open-source tools and tutorials to aid in discovery, analysis and AI assisted modernization of EWS applications. We will publish regular communications as we progress towards this deadline to aid affected tenants in identifying EWS usage. We encourage all customers to monitor Message Center and the Exchange Blog and Deprecation of Exchange Web Services in Exchange Online for related content. Thank you in advance for updating and opening your apps to a wider range of useful and intelligent features on Microsoft Graph. We are extremely excited about the growing opportunities that Microsoft Graph offers to developers, and we remain fully committed to our journey to empower developers to access Microsoft 365 data with the most modern features and tools. |
| 2025-10-20 | MC How Affect | In October 2026 we will begin disabling EWS on all M365 tenants worldwide. EWS Applications that have not been migrated will stop functioning.
The following applications on your tenant use EWS: Entra Application ID fef95295-5986-cc3e-1f1f-572b2f8f6bac, fc8eaab8-e298-47b7-9d2c-abc7f33137af, 00b263e4-3497-4650-b082-3197cfdfdd7c, c55d6177-918e-4745-96d3-1715194bc7e8, 6287b600-88b1-45ce-9e56-4fab9fc07d0b, d2ed0387-a4af-4db0-8d20-8819eeb0b3bc Next Steps Review your application portfolio now to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors.to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors. Prioritize EWS app modernization on your engineering schedule to ensure enough time to address any functionality gaps Disable EWS in your tenant when you no longer have applications that depend on it. We know there are certain parity gaps in Graph API but based on EWS usage telemetry we know that the vast majority of EWS applications can already be safely migrated to Graph API. We encourage you to take the next step and begin the modernization process. Refer to Deprecation of Exchange Web Services in Exchange Online for up-to-date guidance and roadmap information. We also provide a set of open-source tools and tutorials to aid in discovery, analysis and AI assisted modernization of EWS applications. We will publish regular communications as we progress towards this deadline to aid affected tenants in identifying EWS usage. We encourage all customers to monitor Message Center and the Exchange Blog and Deprecation of Exchange Web Services in Exchange Online for related content. Thank you in advance for updating and opening your apps to a wider range of useful and intelligent features on Microsoft Graph. We are extremely excited about the growing opportunities that Microsoft Graph offers to developers, and we remain fully committed to our journey to empower developers to access Microsoft 365 data with the most modern features and tools. | In October 2026 we will begin disabling EWS on all M365 tenants worldwide. EWS Applications that have not been migrated will stop functioning.
The following applications on your tenant use EWS: Entra Application ID 6009f132-f149-4391-a1a6-478bc65b1b36 Next Steps Review your application portfolio now to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors.to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors. Prioritize EWS app modernization on your engineering schedule to ensure enough time to address any functionality gaps Disable EWS in your tenant when you no longer have applications that depend on it. We know there are certain parity gaps in Graph API but based on EWS usage telemetry we know that the vast majority of EWS applications can already be safely migrated to Graph API. We encourage you to take the next step and begin the modernization process. Refer to Deprecation of Exchange Web Services in Exchange Online for up-to-date guidance and roadmap information. We also provide a set of open-source tools and tutorials to aid in discovery, analysis and AI assisted modernization of EWS applications. We will publish regular communications as we progress towards this deadline to aid affected tenants in identifying EWS usage. We encourage all customers to monitor Message Center and the Exchange Blog and Deprecation of Exchange Web Services in Exchange Online for related content. Thank you in advance for updating and opening your apps to a wider range of useful and intelligent features on Microsoft Graph. We are extremely excited about the growing opportunities that Microsoft Graph offers to developers, and we remain fully committed to our journey to empower developers to access Microsoft 365 data with the most modern features and tools. |
| 2025-10-19 | MC How Affect | In October 2026 we will begin disabling EWS on all M365 tenants worldwide. EWS Applications that have not been migrated will stop functioning.
The following applications on your tenant use EWS: Entra Application ID 6009f132-f149-4391-a1a6-478bc65b1b36 Next Steps Review your application portfolio now to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors.to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors. Prioritize EWS app modernization on your engineering schedule to ensure enough time to address any functionality gaps Disable EWS in your tenant when you no longer have applications that depend on it. We know there are certain parity gaps in Graph API but based on EWS usage telemetry we know that the vast majority of EWS applications can already be safely migrated to Graph API. We encourage you to take the next step and begin the modernization process. Refer to Deprecation of Exchange Web Services in Exchange Online for up-to-date guidance and roadmap information. We also provide a set of open-source tools and tutorials to aid in discovery, analysis and AI assisted modernization of EWS applications. We will publish regular communications as we progress towards this deadline to aid affected tenants in identifying EWS usage. We encourage all customers to monitor Message Center and the Exchange Blog and Deprecation of Exchange Web Services in Exchange Online for related content. Thank you in advance for updating and opening your apps to a wider range of useful and intelligent features on Microsoft Graph. We are extremely excited about the growing opportunities that Microsoft Graph offers to developers, and we remain fully committed to our journey to empower developers to access Microsoft 365 data with the most modern features and tools. | In October 2026 we will begin disabling EWS on all M365 tenants worldwide. EWS Applications that have not been migrated will stop functioning.
The following applications on your tenant use EWS: Entra Application ID fef95295-5986-cc3e-1f1f-572b2f8f6bac, fc8eaab8-e298-47b7-9d2c-abc7f33137af, 00b263e4-3497-4650-b082-3197cfdfdd7c, c55d6177-918e-4745-96d3-1715194bc7e8, 6287b600-88b1-45ce-9e56-4fab9fc07d0b, d2ed0387-a4af-4db0-8d20-8819eeb0b3bc Next Steps Review your application portfolio now to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors.to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors. Prioritize EWS app modernization on your engineering schedule to ensure enough time to address any functionality gaps Disable EWS in your tenant when you no longer have applications that depend on it. We know there are certain parity gaps in Graph API but based on EWS usage telemetry we know that the vast majority of EWS applications can already be safely migrated to Graph API. We encourage you to take the next step and begin the modernization process. Refer to Deprecation of Exchange Web Services in Exchange Online for up-to-date guidance and roadmap information. We also provide a set of open-source tools and tutorials to aid in discovery, analysis and AI assisted modernization of EWS applications. We will publish regular communications as we progress towards this deadline to aid affected tenants in identifying EWS usage. We encourage all customers to monitor Message Center and the Exchange Blog and Deprecation of Exchange Web Services in Exchange Online for related content. Thank you in advance for updating and opening your apps to a wider range of useful and intelligent features on Microsoft Graph. We are extremely excited about the growing opportunities that Microsoft Graph offers to developers, and we remain fully committed to our journey to empower developers to access Microsoft 365 data with the most modern features and tools. |
| 2025-10-18 | MC How Affect | In October 2026 we will begin disabling EWS on all M365 tenants worldwide. EWS Applications that have not been migrated will stop functioning.
The following applications on your tenant use EWS: Entra Application ID fef95295-5986-cc3e-1f1f-572b2f8f6bac, fc8eaab8-e298-47b7-9d2c-abc7f33137af, 00b263e4-3497-4650-b082-3197cfdfdd7c, c55d6177-918e-4745-96d3-1715194bc7e8, 6287b600-88b1-45ce-9e56-4fab9fc07d0b, d2ed0387-a4af-4db0-8d20-8819eeb0b3bc Next Steps Review your application portfolio now to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors.to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors. Prioritize EWS app modernization on your engineering schedule to ensure enough time to address any functionality gaps Disable EWS in your tenant when you no longer have applications that depend on it. We know there are certain parity gaps in Graph API but based on EWS usage telemetry we know that the vast majority of EWS applications can already be safely migrated to Graph API. We encourage you to take the next step and begin the modernization process. Refer to Deprecation of Exchange Web Services in Exchange Online for up-to-date guidance and roadmap information. We also provide a set of open-source tools and tutorials to aid in discovery, analysis and AI assisted modernization of EWS applications. We will publish regular communications as we progress towards this deadline to aid affected tenants in identifying EWS usage. We encourage all customers to monitor Message Center and the Exchange Blog and Deprecation of Exchange Web Services in Exchange Online for related content. Thank you in advance for updating and opening your apps to a wider range of useful and intelligent features on Microsoft Graph. We are extremely excited about the growing opportunities that Microsoft Graph offers to developers, and we remain fully committed to our journey to empower developers to access Microsoft 365 data with the most modern features and tools. | In October 2026 we will begin disabling EWS on all M365 tenants worldwide. EWS Applications that have not been migrated will stop functioning.
The following applications on your tenant use EWS: Entra Application ID 6009f132-f149-4391-a1a6-478bc65b1b36 Next Steps Review your application portfolio now to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors.to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors. Prioritize EWS app modernization on your engineering schedule to ensure enough time to address any functionality gaps Disable EWS in your tenant when you no longer have applications that depend on it. We know there are certain parity gaps in Graph API but based on EWS usage telemetry we know that the vast majority of EWS applications can already be safely migrated to Graph API. We encourage you to take the next step and begin the modernization process. Refer to Deprecation of Exchange Web Services in Exchange Online for up-to-date guidance and roadmap information. We also provide a set of open-source tools and tutorials to aid in discovery, analysis and AI assisted modernization of EWS applications. We will publish regular communications as we progress towards this deadline to aid affected tenants in identifying EWS usage. We encourage all customers to monitor Message Center and the Exchange Blog and Deprecation of Exchange Web Services in Exchange Online for related content. Thank you in advance for updating and opening your apps to a wider range of useful and intelligent features on Microsoft Graph. We are extremely excited about the growing opportunities that Microsoft Graph offers to developers, and we remain fully committed to our journey to empower developers to access Microsoft 365 data with the most modern features and tools. |
| 2025-10-15 | MC prepare | https://aka.ms/copilotMcp
https://aka.ms/ews1pageMCP https://aka.ms/EwsAdminReportsMcp https://aka.ms/ewsDeprecationMCP https://aka.ms/ewsToolsMcp https://aka.ms/graphMcp https://aka.ms/powerMcp https://learn.microsoft.com/exchange/client-developer/exchange-web-services/how-to-control-access-to-ews-in-exchange https://techcommunity.microsoft.com/t5/exchange-team-blog/upcoming-changes-to-exchange-web-services-ews-api-for-office-365/ba-p/608055 | |
| 2025-10-15 | MC MessageTagNames | GDPR, User impact, Admin impact, Retirement | User impact, Admin impact, Retirement |
| 2025-10-15 | MC Urgency | high | normal |
| 2025-10-15 | MC Summary | Exchange Web Services (EWS) in Exchange Online will be blocked starting October 1, 2026. Organizations must migrate active EWS applications to Microsoft Graph, Power Platform, or Copilot Declarative Agents. Most EWS apps can already be safely migrated despite some parity gaps. Begin modernization now. | |
| 2025-10-15 | MC Last Updated | 10/15/2025 00:57:01 | 2025-10-15T22:18:39Z |
| 2025-10-15 | MC Messages | A Data Privacy message regarding your organization is available within Message Center. The contents of this message can be accessed within Message Center by a Global Administrator or someone designated as a Message Center Privacy Reader.
Please sign in to Admin Center to view the details of this message in the M365 Message center. | Updated October 15, 2025: We have updated the message to show as intended. Thank you for your feedback.
In 2018, we announced that we were no longer making feature updates to Exchange Web Services (EWS) in Exchange Online, and we advised developers to move to Microsoft Graph. In September 2023, we announced that on October 1, 2026, we will start blocking EWS requests to Exchange Online. We are now less than 12 months from October 1, 2026. We have made progress on closing several parity gaps with more changes in development to be released in the coming quarters. Please refer to Deprecation of Exchange Web Services in Exchange Online for up-to-date guidance and roadmap information. You are receiving this notification because there are EWS applications in your tenant. If you haven't already, start the process of working with your application development organization and your application vendors to either sunset or migrate active EWS applications on your tenant to the Graph API or Power Platform, or Copilot Declarative Agents. While we are aware of certain parity gaps in Graph API we can confidently say based on EWS usage telemetry that the vast majority of custom LOB EWS applications can already be safely migrated to alternative technologies. [When this will happen:] October 1, 2026 |
| 2025-10-15 | MC Title | Action Required: Update active Exchange Web Services Applications | (Updated) Action Required: Update active Exchange Web Services Applications |
| 2025-10-15 | MC How Affect | In October 2026 we will begin disabling EWS on all M365 tenants worldwide. EWS Applications that have not been migrated will stop functioning.
The following applications on your tenant use EWS: Entra Application ID fef95295-5986-cc3e-1f1f-572b2f8f6bac, fc8eaab8-e298-47b7-9d2c-abc7f33137af, 00b263e4-3497-4650-b082-3197cfdfdd7c, c55d6177-918e-4745-96d3-1715194bc7e8, 6287b600-88b1-45ce-9e56-4fab9fc07d0b, d2ed0387-a4af-4db0-8d20-8819eeb0b3bc Next Steps Review your application portfolio now to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors.to get an understanding of which apps need to be updated by your organization, and which applications require updates from vendors. Prioritize EWS app modernization on your engineering schedule to ensure enough time to address any functionality gaps Disable EWS in your tenant when you no longer have applications that depend on it. We know there are certain parity gaps in Graph API but based on EWS usage telemetry we know that the vast majority of EWS applications can already be safely migrated to Graph API. We encourage you to take the next step and begin the modernization process. Refer to Deprecation of Exchange Web Services in Exchange Online for up-to-date guidance and roadmap information. We also provide a set of open-source tools and tutorials to aid in discovery, analysis and AI assisted modernization of EWS applications. We will publish regular communications as we progress towards this deadline to aid affected tenants in identifying EWS usage. We encourage all customers to monitor Message Center and the Exchange Blog and Deprecation of Exchange Web Services in Exchange Online for related content. Thank you in advance for updating and opening your apps to a wider range of useful and intelligent features on Microsoft Graph. We are extremely excited about the growing opportunities that Microsoft Graph offers to developers, and we remain fully committed to our journey to empower developers to access Microsoft 365 data with the most modern features and tools. |
Last updated 8 hours ago ago
