The Admin app for very small businesses in Teams, Outlook, and Microsoft365.com will retire by October 2026, with rollout starting August 2026. It will no longer be pre-installed or supported. Admins should use Microsoft Admin Center, Teams Admin Center, or Microsoft 365 Admin Agent instead.
Applies to: Exchange Online · Microsoft 365 suite · Microsoft Teams
Source: mc.merill.net — data via Merill Fernando's open archive (MIT).