Michael JohnsonMicrosoft will begin phasing out Copilot Prioritize from Outlook clients on October 26, 2026. According to Message Center notice MC1519861, published on October 22, the company expects the changes to be complete by the end of March 2027. The schedule covers the retirement of the feature and its interface across all Outlook clients.
Copilot Prioritize analyzes incoming email and assigns messages priority levels, helping users identify those that need attention. Microsoft’s documentation describes setting criteria, priority labels, and sorting messages in Outlook.
Microsoft says administrators do not need to take technical action to disable the feature. The company recommends notifying affected users in advance, preparing support teams, and removing references to the feature from internal guidance and training materials. As the rollout proceeds, users may lose access to Prioritize at different times.