MC1519861 - (Updated) Outlook: Copilot Prioritize feature will be retired

Microsoft 365 Message Center announcement MC1519861.

MS Message Center's Summary

Microsoft is retiring the Copilot Prioritize feature in Outlook across all clients. The rollback starts on October 26, 2026, and will finish by mid November 2026. Administrators should update internal training materials and notify users who currently rely on the capability before the functionality is removed.

Administrator impact
No direct administrator action is required.
End user impact
Users will lose access to the Copilot Prioritize feature in Outlook.
Importance
3/10: This is a standard feature retirement requiring internal communication and documentation updates.

Microsoft Summary

The Copilot Prioritize feature in Outlook will be retired starting October 26, 2026, with removal completed by March 2027. It will be removed from all Outlook clients without requiring opt-in. No admin action is needed, but users should be notified and support materials updated accordingly.

Message Center ID
MC1519861
Category
plan For Change
Severity
normal
Services
Exchange Online, Microsoft Copilot (Microsoft 365)
Tags
Updated message, Retirement
Published
2026-10-21
Last updated
2026-10-22
Expires
2027-05-03

Updated October 22, 2026: We have updated the timeline and content. Thank you for your patience. [What and Why:] We're retiring the Copilot Prioritize feature in Outlook. Starting October 26, 2026, we'll begin to roll back the feature and remove the corresponding user experience from all Outlook clients as part of the cleanup effort. This change allows us to simplify the Outlook Copilot experience and focus our ongoing investments. [Rollout Schedule:] We will begin this change on October 26, 2026, and expect to complete by end of March 2027. [Impact on Your Organization:] Who is affected: Users who currently have access to Copilot Prioritize in Outlook. Platforms/Services: All Outlook clients Microsoft 365 Copilot What will happen: Copilot Prioritize will be retired, with the rollback beginning October 26, 2026, and expected to be completed by end of March 2027. The Prioritize user experience will be removed from all Outlook clients as part of the retirement and cleanup effort. Users will no longer be able to use the feature after retirement. No opt-in is required because this change removes an existing feature. [Action Required/Recommendations:] No administrative action is required. We recommend that you: Notify affected users of the retirement. Prepare your help desk and support teams for the change. Remove references to Copilot Prioritize from internal documentation, training, and support materials. [Compliance considerations:] No compliance considerations identified. Review as appropriate for your organization.