MC1169587: 30-Day Reminder: Windows 11, version 23H2 (Home and Pro editions) will reach end of servicing on November 11, 2025
On November 11, 2025, Windows 11, version 23H2 (Home and Pro editions)
Microsoft 365 Message Center
An archive of Message Center updates - curated and preserved for when Microsoft changes things faster than you can say "rolling out." Find the latest and past Message Center posts right here. Updated daily at 1am (UK time).
MC1169573: Microsoft PowerPoint: Find and add company approved images with Organization Images
PowerPoint will add Organization Images, allowing users to access company-approved logos and photos directly within the app starting late October 2025. Admins must configure a SharePoint Organization Assets Library to enable this default feature, ensuring brand compliance and simplifying image use.
MC1169566: Exchange ActiveSync TLS 1.3 Certificate Based Authentication Change
Exchange ActiveSync Certificate-Based Authentication now supports TLS 1.3, routing traffic to new tenant-location-based endpoints. Most clients will redirect seamlessly, but organizations using Secure Email Gateways may need to update firewall settings. Rollout began globally, expanding to other ...
MC1169081: Copilot meeting preparation improvements and expanding to more meeting types
Microsoft Copilot in Outlook will expand to support all meeting types, including 1:1s, providing real-time contextual insights and chat-based preparation tools. This update, rolling out worldwide from mid-October to November 2025, is on by default and requires no admin changes. Users should be in...
MC1169078: Microsoft Defender for Cloud Apps: Improvements to threat protection capabilities
Microsoft Defender for Cloud Apps will expand its dynamic threat detection model in November 2025, replacing legacy policies with more accurate, research-driven detections. This update improves threat detection accuracy and responsiveness, requires no admin action before rollout, and includes new...
MC1169075: Microsoft 365 Admin Center: Admin Audit logs in Purview
Admin activities for managing Microsoft Copilot agents will be logged by default in Microsoft Purview Unified Audit Logs starting late October 2025. This enhances security visibility and compliance reporting, capturing detailed agent-related actions accessible via the Purview Portal without requi...
MC1169073: Microsoft 365 Copilot: New usage intensity metrics available in admin center report
New Microsoft 365 Copilot usage intensity metrics will be available in the admin center report by late October 2025, showing prompt counts, daily trends, and active days at organization and user levels. No admin action is needed before rollout; admins should inform stakeholders and review updated...
MC1169072: Microsoft Teams: Microsoft Graph APIs for Teams administration now available in beta
Microsoft Graph beta now offers Teams administration APIs for user configuration, number management, and policy assignment. These enable automation and integration for Teams management, accessible with delegated or application permissions in commercial environments. Admins can begin exploring the...
MC1169071: Microsoft 365 Copilot: MCP-based agents now available in Copilot and Microsoft 365 admin center
Microsoft 365 Copilot now supports MCP-based agents, allowing developers to build and admins to manage these agents via the Copilot Agent Store and admin center. The rollout starts late October 2025, is on by default, and requires no immediate action but recommends reviewing agent catalogs and up...
MC1169070: Manage SharePoint agents in Copilot Control System: View, block, or unblock agents used in Copilot Chat
Microsoft 365 admins can now manage SharePoint agents in Copilot Chat via a new Agents section in the Copilot Control System. They can view, block, or unblock agents starting late September 2025. This feature is enabled by default and only affects Copilot Chat.
MC1169068: Microsoft Loop: Copilot experience upgrade
Microsoft Loop is upgrading its Copilot experience to align with Microsoft 365 Copilot Pages, temporarily removing older integrations starting September 9, 2025. The update will provide consistent, improved Copilot features across chat and pages. Users should update training materials accordingly...
MC1169041: Dynamics 365 Contact Center - Split recordings speaker-wise in closed conversation view
We are announcing the ability to split recordings by speaker in the