516570 – Microsoft Copilot (Microsoft 365): [Copilot Chat] Updated UI for Microsoft Copilot Navigation Pane in Word, Excel, PowerPoint, OneNote, Outlook, and Teams

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check before: 2025-12-01

Product:

Copilot, Microsoft 365 Apps, OneNote, Outlook, Teams

Platform:

Web, Windows Desktop, World tenant

Status:

In development

Change type:

Links:

Details:

We’re refreshing the Copilot Chat navigation pane to simplify the agents list and increase the visible chat history list beyond a user's five most recent chats with a more prominent chat history search UI.

Change Category:
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Scope:
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Release Phase:
General Availability

Created:
2025-11-17

updated:
2025-11-27

Docu to Check

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MS workload name

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summary for non-techies**

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Direct effects for Operations**

User Interface Changes
The updated UI may confuse users who are accustomed to the previous layout, leading to a temporary decrease in productivity as they adapt to the new navigation pane.
   - roles: End Users, Support Staff
   - references: https://www.microsoft.com/en-us/microsoft-365/blog/2023/10/01/whats-new-in-microsoft-365-october-2023/

Increased Chat History
The increase in visible chat history may lead to information overload for users, making it harder to find relevant conversations quickly, potentially impacting decision-making processes.
   - roles: End Users, Team Leaders
   - references: https://www.microsoft.com/en-us/microsoft-365/blog/2023/10/01/whats-new-in-microsoft-365-october-2023/

Configutation Options**

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explanation for non-techies**

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** AI generated content. This information must be reviewed before use.

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change history

DatePropertyoldnew
2025-11-27RM ReleaseNovember CY2025December CY2025

Last updated 2 weeks ago ago

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