Microsoft 365 Copilot: Session persistence enhancement for Copilot chat

Microsoft 365 Copilot chat will preserve conversations by creating session entries in the navigation pane when a prompt is submitted, allowing users to return without losing progress. This update rolls out globally from October to November 2025, requires no admin action, and improves chat continuity. 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 all users where Copilot has been enabled. This message is associated with Microsoft 365 Roadmap ID 500638. When this will happen: Worldwide (General Availability): Rolling out from October 27, 2025, to October 31, 2025 GCC: Rolling out from November 3, 2025, to November 28, 2025 GCC High: Rolling out from November 10, 2025, to November 28, 2025 DoD: Rolling out from November 10, 2025, to November 28, 2025 How this affects your organization: Who is affected: All users of Microsoft Copilot (Microsoft 365) 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: Compliance considerations: Inform helpdesk staff of this behavior change. Update internal documentation if you describe Copilot chat behavior. No compliance considerations identified, review as appropriate for your organization. Message ID: MC1174856

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