M365 Admin Center Global Administrator Lockout

Because all administrator accounts are inaccessible and your licences come through a partner, start with that partner’s support team. Microsoft’s business-support guidance directs customers who bought all subscriptions through a partner to the partner for support.

Ask them to check whether their delegated permissions allow recovery or creation of a Microsoft service request for your tenant. If they lack the required permissions, they must follow Microsoft’s tenant-lockout support guidance rather than attempt to bypass authentication.

Give the case owner your tenant identifier, affected administrator names, exact sign-in error, business impact, and all three case references. Request confirmation of the responsible owner, the next verification step, and the callback time. Provide ownership evidence only through the authenticated support process.

I cannot access or escalate those tickets from this community, and no recovery deadline can be promised here. If the partner cannot raise the request, use Microsoft’s published business-support phone route.