Entra ID Dynamic Groups Drop the memberOf Rule Operator

MC1448379 (5 August 2026) announces the retirement of the MemberOf rule operator from Entra ID in early November 2026. The removal of the rule operator might affect the membership rules used for dynamic groups, dynamic administrative units, and auto-assigned entitlement management policies. If a tenant doesn’t act, Entra ID will stop processing the rules and memberships will become increasingly inaccurate. And that’s a bad thing!