Microsoft 365 Copilot: Session persistence enhancement for Copilot chat

• https://www.microsoft.com/microsoft-365/roadmap?filters=&searchterms=500638

1. 22 May 2026

   Updated April 3,May 22, 2026: We have updated the timeline. Thank you for your patience.  Introduction … Rolling out from December 12, 2025 (previously December 3), to end of AprilJune 2026 (previously March)end of April) GCC: Rolling out from January 19, 2026 (previously January 3), to end of AprilJune 2026 (previously March)end of April) GCC High: Rolling out from January 19, 2026 (previously January 3), to end of AprilJune 2026 (previously March)end of April) DoD: Rolling out from January 19, 2026 (previously January 3), to end of AprilJune 2026 (previously March)end of April) How this affects your organization: Who is affected: All Copilot Chat and …

2. 3 Apr 2026

   Updated February 17,April 3, 2026: We have updated the content and timelines. timeline. Thank you for your patience.  Introduction We’re improving the reliability of Copilot … (General Availability): Rolling out from December 12, 2025 (previously December 3), to Marchend of April 2026 (previously January 12) March) GCC: Rolling out from January 19, 2026 (previously January 3), to Marchend of April 2026 (previously February 2) March) GCC High: Rolling out from January 19, 2026 (previously January 3), to Marchend of April 2026 (previously February 2) March) DoD: Rolling out from January 19, 2026 (previously January 3), to Marchend of April 2026 (previously February 2)March) How this affects your organization: Who is affected: All Copilot Chat and …

3. 17 Feb 2026

   Updated December 11, 2025:February 17, 2026: We have updated the content and timelines. Thank you for your patience. … (General Availability): Rolling out from December 12, 2025 (previously December 3), to January 12, March 2026 (previously December 18, 2025) January 12) GCC: Rolling out from January 19, 2026 (previously January 3), to February 2, March 2026 (previously January 30)February 2) GCC High: Rolling out from January 19, 2026 (previously January 3), to February 2, March 2026 (previously January 30)February 2) DoD: Rolling out from January 19, 2026 (previously January 3), to February 2, March 2026 (previously January 30)February 2) How this affects your organization: Who is affected: All Copilot Chat and …

4. 11 Dec 2025

   Updated December 3,11, 2025: We have updated the content and timelines. Thank you for your … 500638. When this will happen: Worldwide (General Availability): Rolling out from December 3,12, 2025 (previously November 5),December 3), to December 18, 2025January 12, 2026 (previously November 30)December 18, 2025) GCC: Rolling out from January 3,19, 2026 (previously November 19, 2025), January 3), to January 30,February 2, 2026 (previously November 30, 2025) January 30) GCC High: Rolling out from January 3,19, 2026 (previously November 26, 2025), January 3), to January 30,February 2, 2026 (previously November 30, 2025) January 30) DoD: Rolling out from January 3,19, 2026 (previously November 19, 2025), January 3), to January 30,February 2, 2026 (previously November 30, 2025)January 30) How this affects your organization: Who is affected: All Copilot Chat and …

5. 3 Dec 2025

   Updated October 30,December 3, 2025: We have updated the timeline.content and timelines. Thank you for your patience.  Introduction We’re improving the reliability of Copilot … later without losing context or progress. This capability will be available to users with a Microsoft 365 Copilot Starter or Premium license. No additional license or add-on is required beyond a valid Chat and Microsoft 365 Copilot license.users. This message is associated with Microsoft 365 Roadmap ID 500638. When this will happen: Worldwide (General Availability): Rolling out from November 5,December 3, 2025 (previously October 27),November 5), to November 30,December 18, 2025 (previously October 31)November 30) GCC: Rolling out from November 19, 2025January 3, 2026 (previously November 3),19, 2025), to NovemberJanuary 30, 20252026 (previously November 28)30, 2025) GCC High: Rolling out from November 26, 2025January 3, 2026 (previously November 10),26, 2025), to NovemberJanuary 30, 20252026 (previously November 2830, 2025) DoD: Rolling out from November 19, 2025January 3, 2026 (previously November 10),19, 2025), to NovemberJanuary 30, 20252026 (previously November 28)30, 2025) How this affects your organization: Who is affected: All users ofCopilot Chat and Microsoft 365 Copilot (Microsoft 365) users in commercial, GCC, GCC High, and DoD environments with a valid Microsoft 365 Copilot Starter or Premium license. environments. What will happen: A session entry will now appear in the navigation … No admin action is required at this time. You may wish to: Confirm that users have a Microsoft 365 Copilot Starter or Premium license. Inform helpdesk staff of this behavior change. Update internal documentation if you …

6. 30 Oct 2025
   • Tags New feature, User impact, Admin impact → Updated message, New feature, User impact, Admin impact

   Updated October 30, 2025: We have updated the timeline. Thank you for your patience.  Introduction We’re improving the reliability of Copilot chat by ensuring that conversations … later without losing context or progress. This capability will be available to all users whereusers with a Microsoft 365 Copilot has been enabled.Starter or Premium license. No additional license or add-on is required beyond a valid Microsoft 365 Copilot license. This message is associated with Microsoft 365 Roadmap ID 500638. When this will happen: Worldwide (General Availability): Rolling out from November 5, 2025 (previously October 27, 2025, 27), to October 31,November 30, 2025 (previously October 31) GCC: Rolling out from November 3, 2025,19, 2025 (previously November 3), to November 28,30, 2025 (previously November 28) GCC High: Rolling out from November 10, 2025,26, 2025 (previously November 10), to November 28,30, 2025 (previously November 28 DoD: Rolling out from November 10, 2025,19, 2025 (previously November 10), to November 28,30, 2025 (previously November 28) How this affects your organization: Who is affected: All users of Microsoft Copilot (Microsoft 365) in commercial, GCC, GCC High, and DoD environments.environments with a valid Microsoft 365 Copilot Starter or Premium license. What will happen: A session entry will now appear in the navigation … No admin action is required at this time. You may wish to: Confirm that users have a Microsoft 365 Copilot Starter or Premium license. Inform helpdesk staff of this behavior change. Update internal documentation if you …

7. 18 Oct 2025 · first version seen

The notice links to no Microsoft Learn or Support page that this installation reads.

No related evidence found in this installation's recent collection. This does not establish that no announcement exists.

• Whether your tenant is affected: this is Microsoft's notice, not a check of your settings.