MC1174856 – M365 Change Digest

One-line summary

Copilot Chat now saves conversations instantly in the navigation pane, letting users return to chats without losing context; no admin action needed.

Similar updates

Details

RoadmapIds

500638

Summary

Microsoft 365 Copilot chat will preserve conversations by creating session entries in the navigation pane upon prompt submission, allowing users to return without losing progress. This update, rolling out December 2025 to April 2026, requires no admin action and improves chat reliability across all environments.

Platforms

Web

Body (from Message Center)

Updated April 3, 2026: We have updated the timeline. 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 end of April 2026 (previously March)
GCC: Rolling out from January 19, 2026 (previously January 3), to end of April 2026 (previously March)
GCC High: Rolling out from January 19, 2026 (previously January 3), to end of April 2026 (previously March)
DoD: Rolling out from January 19, 2026 (previously January 3), to end of April 2026 (previously March)

[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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    "ai_actions": [
      "Inform helpdesk staff of behavior change",
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    ],
    "ai_master_tags": [
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    "ai_model": "gpt-4.1",
    "ai_summary": "Copilot Chat now saves conversations instantly in the navigation pane, letting users return to chats without losing context; no admin action needed.",
    "ai_topics": [
      "Copilot",
      "Copilot Chat"
    ],
    "category": "stayInformed",
    "details_map": {
      "Platforms": "Web",
      "RoadmapIds": "500638",
      "Summary": "Microsoft 365 Copilot chat will preserve conversations by creating session entries in the navigation pane upon prompt submission, allowing users to return without losing progress. This update, rolling out December 2025 to April 2026, requires no admin action and improves chat reliability across all environments."
    },
    "id": "MC1174856",
    "importance": 1,
    "is_major_change": false,
    "last_modified": "2026-04-03T20:42:29Z",
    "ms_products": [
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      "Copilot Chat"
    ],
    "platforms": "Web",
    "roadmap_ids": [
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    ],
    "services": [
      "Microsoft Copilot (Microsoft 365)",
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    ],
    "severity": "normal",
    "tags": [
      "Updated message",
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    ],
    "title": "(Updated) Microsoft 365 Copilot: Session persistence enhancement for Copilot chat"
  }
}