Migrate Entra MemberOf Rules Before Retirement

Executive Brief

Microsoft and the cited IT-pro coverage state that the Entra ID MemberOf rule operator is scheduled for retirement on November 3, 2026, with Message Center reference MC1448379. The saved Microsoft Entitlement Management guidance separately describes an October 27, 2026 action affecting auto-assignment policies that use memberOf. Affected configurations can stop processing and retain their last evaluated state, creating stale membership and downstream licensing or access risk. Microsoft guidance should remain the authority for dates and scope; administrators need to inventory affected objects and choose among supported attribute rules, assigned membership, or separately validated synchronization before the change.