check before: 2023-10-06
Product:
Exchange, Microsoft 365 Apps, Microsoft Graph, Outlook, Teams
Platform:
Developer, Mac, Online, Web, World tenant
Status:
Change type:
Admin impact, Retirement
Links:
Details:
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.
Today, we are announcing that on October 1, 2026, we will start blocking EWS requests from non-Microsoft apps to Exchange Online.
[When this will happen:]
October 1, 2026
Change Category:
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Scope:
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Release Phase:
Created:
2023-09-22
updated:
2024-08-10
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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Direct effects for Operations**
- Impact on IT Operations
- Disruption in existing applications relying on EWS for data access, leading to potential downtime or degraded performance.
- Roles impacted: Application Developers, IT Operations Teams
- Increased workload for IT teams to monitor and manage the transition to Microsoft Graph, including troubleshooting and support for affected applications.
- Roles impacted: IT Support Staff, System Administrators
- Impact on IT Services
- Potential service outages for applications that do not transition to Microsoft Graph before the EWS retirement date, affecting service availability.
- Roles impacted: Service Managers, IT Service Desk
- Need for reconfiguration of integrations and workflows that currently utilize EWS, which may lead to temporary service disruptions during the transition.
- Roles impacted: Integration Specialists, Business Analysts
- Impact on IT Users
- Users may experience interruptions in email and calendar functionalities if their applications are not updated to use Microsoft Graph, leading to decreased productivity.
- Roles impacted: End Users, Project Managers
- Lack of access to certain features that are not yet available in Microsoft Graph, which may hinder user experience and operational efficiency.
- Roles impacted: End Users, Team Leaders
- Impact on IT Administrators
- Increased demand for training and resources to familiarize administrators with Microsoft Graph, which may divert attention from other critical tasks.
- Roles impacted: IT Administrators, Training Coordinators
- Requirement for ongoing communication with stakeholders about the transition, including updates on feature gaps and timelines, which may strain administrative resources.
- Roles impacted: IT Managers, Communication Officers
- Dependencies and Interdependencies
- Applications that rely on EWS may have dependencies on other services (e.g., CRM systems, reporting tools) that could also be affected by the transition, leading to a cascading impact on multiple systems.
- Roles impacted: Application Architects, System Integrators
- The transition to Microsoft Graph may necessitate updates to security protocols and compliance measures, impacting overall IT governance and risk management strategies.
- Roles impacted: Compliance Officers, Security Analysts
References:
- Microsoft Graph What's New: https://learn.microsoft.com/graph/whats-new-overview
- Microsoft Modern Lifecycle Policy: https://learn.microsoft.com/lifecycle/policies/modern
- Microsoft Tech Community Blog on EWS Changes: https://techcommunity.microsoft.com/t5/exchange-team-blog/upcoming-changes-to-exchange-web-services-ews-api-for-office-365/ba-p/608055
Opportunities**
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Potentional Risks**
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** AI generated content. This information is not reliable.
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Last updated 6 months ago
