check before: 2024-06-04
Product:
Defender, Defender for Office 365, Defender XDR, Exchange
Platform:
Online, Web, World tenant
Status:
Launched
Change type:
Admin impact, New feature, Updated message
Links:
Details:
Summary:
Microsoft Defender for Office 365 will soon allow blocking of top-level domains and subdomains via the Tenant Allow/Block List, rolling out from late May to late June. This update applies to customers with Microsoft Exchange Online Protection and Microsoft Defender for Office 365 Plan 1 or Plan 2. No admin action is required before the rollout.
Details:
Updated May 31, 2024: We have updated the content below with links to additional information. Thank you for your patience.
This message applies to customers with Microsoft Exchange Online Protection and Microsoft Defender for Office 365 Plan 1 or Plan 2.
Soon, you will be able to block sender emails based on their top-level domain by creating block entries in the Tenant Allow/Block List in Microsoft Defender XDR.
This message is associated with Microsoft 365 Roadmap ID 389853.
[When this will happen:]
This change will start rolling out in late May 2024 and should be completed by late June 2024.
Change Category:
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Scope:
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Release Phase:
General Availability
Created:
2024-05-21
updated:
2024-06-01
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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linked item details
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Direct effects for Operations**
- Direct Impact on IT Operations
- Increased Email Security
- Role Impacted: IT Security Administrators
- The ability to block top-level domains and subdomains will enhance the organization's email security posture, reducing the risk of phishing and spam attacks.
- This change may require adjustments in monitoring and response protocols to handle potential false positives or legitimate emails being blocked.
- Potential for Increased Support Requests
- Role Impacted: IT Helpdesk Staff
- Users may experience issues with legitimate emails being blocked, leading to an increase in support tickets and user inquiries.
- Helpdesk staff will need to be trained on the new functionality to assist users effectively and may require additional resources to manage the increased volume of support requests.
- Direct Impact on IT Services
- Changes in Email Flow Management
- Role Impacted: IT Operations Managers
- The new blocking feature will alter how emails are processed, potentially affecting existing workflows and automated processes that rely on email communications.
- IT Operations Managers will need to assess and possibly update documentation and training materials to reflect these changes in email management.
- Dependency on Microsoft Defender for Office 365
- Role Impacted: IT Administrators
- The successful implementation of this feature is dependent on the stability and performance of Microsoft Defender for Office 365 services.
- Any outages or issues with Microsoft services during the rollout could impact email delivery and security, necessitating contingency planning and communication strategies to inform users of potential disruptions.
References:
- Microsoft Documentation on Tenant Allow/Block List: [Microsoft Docs](https://learn.microsoft.com/defender-office-365/tenant-allow-block-list-email-spoof-configure?source=recommendations)
- Microsoft 365 Roadmap: [Microsoft 365 Roadmap](https://www.microsoft.com/microsoft-365/roadmap?rtc=1%26filters=&searchterms=389853)
Data Protection**
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** AI generated content. This information is not reliable.
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change history
| Date | Property | old | new |
| 2024-06-01 | MC Last Updated | 05/21/2024 01:09:10 | 2024-05-31T20:28:02Z |
| 2024-06-01 | MC Messages | This message applies to customers with Microsoft Exchange Online Protection and Microsoft Defender for Office 365 Plan 1 or Plan 2.
Soon, you will be able to block sender emails based on their top-level domain by creating block entries in the Tenant Allow/Block List in Microsoft Defender XDR. This message is associated with Microsoft 365 Roadmap ID 389853. [When this will happen:] This change will start rolling out in late May and should be completed by late June. | Updated May 31, 2024: We have updated the content below with links to additional information. Thank you for your patience.
This message applies to customers with Microsoft Exchange Online Protection and Microsoft Defender for Office 365 Plan 1 or Plan 2. Soon, you will be able to block sender emails based on their top-level domain by creating block entries in the Tenant Allow/Block List in Microsoft Defender XDR. This message is associated with Microsoft 365 Roadmap ID 389853. [When this will happen:] This change will start rolling out in late May 2024 and should be completed by late June 2024. |
| 2024-06-01 | MC MessageTagNames | New feature, Admin impact | Updated message, New feature, Admin impact |
| 2024-06-01 | MC prepare | This rollout will happen automatically by the specified dates with no admin action required before the rollout. Your existing Tenant Allow/Block List entries as it won't be affected.
Before rollout, we will update this post with revised documentation. https://learn.microsoft.com/microsoft-365/security/office-365-security/tenant-allow-block-list-about https://security.microsoft.com/tenantAllowBlockList https://security.microsoft.com/tenantAllowBlockList?viewid=Sender https://www.microsoft.com/microsoft-365/roadmap?rtc=1%26filters=&searchterms=389853 | This rollout will happen automatically by the specified dates with no admin action required before the rollout. Your existing Tenant Allow/Block List entries as it won't be affected.
Additional information: Allow or block email using the Tenant Allow/Block List https://learn.microsoft.com/defender-office-365/tenant-allow-block-list-email-spoof-configure?source=recommendations https://learn.microsoft.com/microsoft-365/security/office-365-security/tenant-allow-block-list-about https://security.microsoft.com/tenantAllowBlockList https://security.microsoft.com/tenantAllowBlockList?viewid=Sender https://www.microsoft.com/microsoft-365/roadmap?rtc=1%26filters=&searchterms=389853 |
Last updated 4 weeks ago
