MC1174856 – M365 Change Digest

One-line summary

Copilot chat sessions will now be preserved in the navigation pane after a prompt is submitted, allowing users to return without losing context or progress.

Similar updates

Details

RoadmapIds

500638

Summary

Microsoft 365 Copilot chat now preserves conversations by creating a session entry in the navigation pane when a prompt is submitted, allowing users to return without losing progress. This update rolls out worldwide from December 12, 2025, with no admin action required.

Platforms

Web

Body (from Message Center)

Updated December 11, 2025: We have updated the content and timelines. Thank you for your patience.

[Introduction]

We’re improving the reliability of Copilot chat by ensuring that conversations are preserved even when users navigate away from a chat. With this update, a session entry is created in the navigation pane as soon as a prompt is submitted. This allows users to return to the conversation later without losing context or progress.

This capability will be available to Microsoft 365 Copilot Chat and Microsoft 365 Copilot users.

This message is associated with Microsoft 365 Roadmap ID 500638.

[When this will happen:]

Worldwide (General Availability): Rolling out from December 12, 2025 (previously December 3), to January 12, 2026 (previously December 18, 2025)
GCC: Rolling out from January 19, 2026 (previously January 3), to February 2, 2026 (previously January 30)
GCC High: Rolling out from January 19, 2026 (previously January 3), to February 2, 2026 (previously January 30)
DoD: Rolling out from January 19, 2026 (previously January 3), to February 2, 2026 (previously January 30)

[How this affects your organization:]

Who is affected: All Copilot Chat and Microsoft 365 Copilot users in commercial, GCC, GCC High, and DoD environments.

What will happen:

A session entry will now appear in the navigation pane immediately after a prompt is submitted.
Users can navigate away from a chat and return later without losing the conversation.
This update improves continuity and reduces the risk of session loss.
No changes to admin settings or policies are required.

[What you can do to prepare:]

No admin action is required at this time. You may wish to:

Inform helpdesk staff of this behavior change.
Update internal documentation if you describe Copilot chat behavior.

[Compliance considerations:]

No compliance considerations identified, review as appropriate for your organization.

Raw JSON (for debugging)

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    "action_required_by": null,
    "ai_action_required_by": null,
    "ai_actions": [
      "Inform helpdesk staff of chat session behavior change",
      "Update internal documentation on Copilot chat"
    ],
    "ai_master_tags": [],
    "ai_model": "gpt-4.1",
    "ai_summary": "Copilot chat sessions will now be preserved in the navigation pane after a prompt is submitted, allowing users to return without losing context or progress.",
    "ai_topics": [
      "Copilot",
      "Copilot Chat"
    ],
    "category": "stayInformed",
    "details_map": {
      "Platforms": "Web",
      "RoadmapIds": "500638",
      "Summary": "Microsoft 365 Copilot chat now preserves conversations by creating a session entry in the navigation pane when a prompt is submitted, allowing users to return without losing progress. This update rolls out worldwide from December 12, 2025, with no admin action required."
    },
    "id": "MC1174856",
    "importance": 1,
    "is_major_change": false,
    "last_modified": "2025-12-11T18:50:54Z",
    "ms_products": [
      "Copilot",
      "Copilot Chat"
    ],
    "platforms": "Web",
    "roadmap_ids": [
      "500638"
    ],
    "services": [
      "Microsoft Copilot (Microsoft 365)",
      "Microsoft 365 Copilot Chat"
    ],
    "severity": "normal",
    "tags": [
      "Updated message",
      "New feature",
      "User impact",
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    ],
    "title": "(Updated) Microsoft 365 Copilot: Session persistence enhancement for Copilot chat"
  }
}