from 12/22/2025 to 12/28/2025
6 Office 365 Message Center Items were changed and
1 Office 365 Message Center Items were added
Please note: Only common Message Center messages are in this list you should always check your Message Center for additional messages
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Changes
MC Action Required By changes
| MC ID | MC Title | Old Value | New Value | MC Action required by |
|---|---|---|---|---|
| MC1192257 | (Updated) Microsoft Defender Threat Intelligence: Convergence with Microsoft Defender and Microsoft Sentinel | 01/07/2026 09:00:00 | 2026-08-01T10:00:00Z | 08/01/2026 |
MC End Time changes
| MC ID | MC Title | Old Value | New Value | MC Action required by |
|---|---|---|---|---|
| MC1077861 | (Updated) Microsoft Defender for Cloud Apps: SIEM agents will retire | 02/16/2026 09:00:00 | 2026-03-31T10:00:00Z | 06/18/2025 |
| MC1154790 | (Updated) Microsoft 365 Copilot App for Windows: "Update available" button | 11/30/2025 09:00:00 | 2026-03-02T09:00:00Z | N/A |
| MC1182706 | (Updated) Microsoft Teams Rooms: Front-of-room view control for Town Halls on Android | 02/08/2026 09:00:00 | 2026-03-16T09:00:00Z | N/A |
| MC791114 | (Updated) Data Loss Prevention: Decoupling policy tips and email notifications for SharePoint and OneDrive | 04/06/2026 09:00:00 | 2026-05-04T09:00:00Z | N/A |
MC How Affect changes
| MC ID | MC Title | Old Value | New Value | MC Action required by |
|---|---|---|---|---|
| MC1154790 | (Updated) Microsoft 365 Copilot App for Windows: "Update available" button | Who is affected: All users of the Microsoft 365 Copilot app on Windows. What will happen: A new Update available button will appear in the bottom-left corner of the app's navigation pane when a newer version is available. The button is non-blocking; users can continue using the app without interruption. Once updated, the button disappears until a new version becomes available. |
Who is affected: All users of the Microsoft 365 Copilot app on Windows. What will happen: A new Update button will appear in the top-right corner in the app when a newer version is available. The button is non-blocking; users can continue using the app without interruption. Once updated, the button disappears until a new version becomes available. |
N/A |
MC Messages changes
| MC ID | MC Title | Old Value | New Value | MC Action required by |
|---|---|---|---|---|
| MC1025217 | (Updated) Microsoft Teams: In channels, the "Shared" tab (formerly the "Files" tab) will have new capabilities | Updated December 15, 2025: We have updated the timeline. Thank you for your patience. Coming soon for Microsoft Teams: In channels, we will rename the Files tab as the Shared tab to enable users to view content shared in posts and content in the document library in one place. Note: The Shared tab in chats will not be affected by this change. This message applies to Teams for Windows desktop and Teams for Mac desktop. This message is associated with Microsoft 365 Roadmap ID 470597. [When this will happen:] Targeted Release: We will begin rolling out early November 2025 and expect to complete by mid-November 2025. General Availability (Worldwide): We will begin rolling out mid-November 2025 and expect to complete by mid-January 2026 (previously late November 2025). |
Updated December 22, 2025: We have updated the timeline. Thank you for your patience. Coming soon for Microsoft Teams: In channels, we will rename the Files tab as the Shared tab to enable users to view content shared in posts and content in the document library in one place. Note: The Shared tab in chats will not be affected by this change. This message applies to Teams for Windows desktop and Teams for Mac desktop. This message is associated with Microsoft 365 Roadmap ID 470597. [When this will happen:] Targeted Release: We will begin rolling out early November 2025 and expect to complete by mid-November 2025. General Availability (Worldwide): We will begin rolling out mid-November 2025 and expect to complete by mid-January 2026 (previously late November 2025). GCC: Start mid Dec 2025 and finish by late Jan 2026 |
N/A |
| MC1077861 | (Updated) Microsoft Defender for Cloud Apps: SIEM agents will retire | Updated December 1, 2025: We have updated the timeline. Thank you for your patience. As part of our ongoing convergence process for all Microsoft Defender workloads, we will retire SIEM (Security Information and Event Management) agents from Microsoft Defender for Cloud Apps in starting late December 2025 (previously mid-November) and ending early January 2026 (previously late November 2025). We recommend you transition to APIs that support the management of activities and alerts data from multiple workloads. |
Updated December 23, 2025: We have paused rollout of this feature. We will announce via Message center when we are ready to proceed. Thank you for your patience. As part of our ongoing convergence process for all Microsoft Defender workloads, we planned to retire SIEM (Security Information and Event Management) agents from Microsoft Defender for Cloud Apps in late December 2025 (previously mid-November) and ending early January 2026 (previously late November 2025). We have puased this release and will communicate via Message center when we are ready to proceed. We recommend you transition to APIs that support the management of activities and alerts data from multiple workloads. |
06/18/2025 |
| MC1154790 | (Updated) Microsoft 365 Copilot App for Windows: "Update available" button | Updated October 24, 2025: We have updated the timeline. Thank you for your patience. [Introduction] Starting in early November, the Microsoft 365 Copilot app for Windows will introduce a new Update available button. This button will not block the app UI; users will be able to continue interacting with the app when the button appears. This update encourages users to use the latest version of the app-ensuring access to new features, performance improvements, and security updates-without disrupting their workflow. [When this will happen:] General Availability: Rollout begins in early November 2025 (previously early October) and completes by end of November 2025 (previously end of October). |
Updated December 23, 2025: We have updated the content and timeline. Thank you for your patience. [Introduction] Starting in January, the Microsoft 365 Copilot app for Windows will introduce a new Update button. This button will not block the app UI; users will be able to continue interacting with the app when the button appears. This update encourages users to use the latest version of the app-ensuring access to new features, performance improvements, and security updates-without disrupting their workflow. [When this will happen:] General Availability: Rollout begins in January 2026 (previously early November 2025) and completes by end of January 2026 (previously end of November 2025). |
N/A |
| MC1182706 | (Updated) Microsoft Teams Rooms: Front-of-room view control for Town Halls on Android | [Introduction] We're introducing the Adaptive Front-of-Room Experience for Microsoft Teams Rooms on Android in Town Hall scenarios. This update helps create a distraction-free experience for attendees while giving presenters full control over what's shown on the front-of-room display. It's designed to support hybrid Town Halls where presenters and attendees share the same physical space. A Microsoft Teams Rooms Pro license is required to use this feature. This message is associated with RMID 500378. [When this will happen:] General Availability (Worldwide): Rollout will begin by the second week of December 2025. |
Updated December 22, 2025: We have updated the timeline. Thank you for your patience. [Introduction] We're introducing the Adaptive Front-of-Room Experience for Microsoft Teams Rooms on Android in Town Hall scenarios. This update helps create a distraction-free experience for attendees while giving presenters full control over what's shown on the front-of-room display. It's designed to support hybrid Town Halls where presenters and attendees share the same physical space. A Microsoft Teams Rooms Pro license is required to use this feature. This message is associated with RMID 500378. [When this will happen:] Targeted release: Rollout will begin in early December 2025. General Availability (Worldwide): Rollout will begin by early February 2026 (previously mid-December 2025). |
N/A |
| MC791114 | (Updated) Data Loss Prevention: Decoupling policy tips and email notifications for SharePoint and OneDrive | Updated September 26, 2025: We have updated the timeline. Thank you for your patience. Coming soon to Microsoft Purview | Data Loss Prevention: When an admin wants to enable user email notifications, policy tips also need to be enabled and vice versa. After this rollout, notifications and policy tips will be decoupled, and admins can configure the following rules to enable: Only a user email notification Only a policy tip A user email notification and a policy tip No policy tips or user email notifications After this rollout, policy tips and user email notifications will align with the behavior currently available with Microsoft Exchange. This message is associated with Microsoft 365 Roadmap ID 394279. [When this will happen:] Public Preview: We will begin rolling out late January 2026 (previously late June) and expect to complete by late February 2026 (previously late July). General Availability Worldwide: We will begin rolling out late March 2025 (previously late December) and expect to complete by late April 2026 (previously late January). |
Updated December 22, 2025: We have updated the timeline. Thank you for your patience. Coming soon to Microsoft Purview | Data Loss Prevention: When an admin wants to enable user email notifications, policy tips also need to be enabled and vice versa. After this rollout, notifications and policy tips will be decoupled, and admins can configure the following rules to enable: Only a user email notification Only a policy tip A user email notification and a policy tip No policy tips or user email notifications After this rollout, policy tips and user email notifications will align with the behavior currently available with Microsoft Exchange. This message is associated with Microsoft 365 Roadmap ID 394279. [When this will happen:] Public Preview: We will begin rolling out February 20, 2026 (previously late January 2026) and expect to complete by late February 2026 (previously late July). General Availability Worldwide: We will begin rolling out March 2026 (previously late March) and expect to complete in March 2026 (previously late April). |
N/A |
MC Title changes
| MC ID | MC Title | Old Value | New Value | MC Action required by |
|---|---|---|---|---|
| MC1182706 | (Updated) Microsoft Teams Rooms: Front-of-room view control for Town Halls on Android | Microsoft Teams Rooms: Front-of-room view control for Town Halls on Android | (Updated) Microsoft Teams Rooms: Front-of-room view control for Town Halls on Android | N/A |
CW52 New Office 365 Message Center items
| MC ID | MC Title | MC Category | MC Workload | MC Major Change | MC Action required by |
|---|---|---|---|---|---|
| MC1202974 | Microsoft Outlook: Customizable oversharing dialog for DLP in New Outlook | Stay Informed | Exchange Online | False | N/A |
