Microsoft Outlook: Themes by Copilot retirement

Themes by Copilot in Microsoft Outlook will be retired worldwide from mid- to late October 2026. Users with a Copilot license will lose the ability to select or revert to these themes, though current themes remain until changed. No action is required. We are retiring Themes by Copilot in Microsoft Outlook. Themes by Copilot currently allows users with a Copilot license to create and apply a Copilot-generated theme in Settings. As part of this change, Themes by Copilot will be removed from Settings, and users will no longer be able to select or return to a Theme by Copilot after changing to a different theme. Rollout schedule General Availability (Worldwide): Retirement begins in mid-October 2026 and is expected to complete by late October 2026. Impact on your organization Who is affected Users with a Copilot license. Platforms and services New Outlook for Windows Outlook for Android Outlook for iOS Outlook for Mac Outlook on the web What will happen Themes by Copilot will be removed from Settings. Users who are currently using a Theme by Copilot will retain their current theme until they change it. Themes by Copilot configured to automatically refresh will remain applied but will stop refreshing. Users will retain the current theme imagery until they change their theme. Users can change from their existing Theme by Copilot to a non-Copilot theme but cannot return to a Theme by Copilot after doing so. Action required and recommendations No action is required. Message ID: MC1492954

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