Forum Discussion
Sole Microsoft 365 Admin Locked Out After Phone Replacement / Lost MFA Device
I am the sole admin for a Microsoft 365 tenant and I am currently locked out after replacing my phone.
The old phone was wiped before Microsoft Authenticator was fully re-registered on the new device. Authenticator was the only MFA method configured on the account.
Current situation: password is known, Teams desktop sessions are still active, Authenticator cloud backup restored successfully, but all Microsoft security and admin pages still require approval from the old Authenticator registration.
I cannot access Security Info, Entra Admin, or Microsoft 365 Admin Center because every path loops back to the dead MFA registration.
I have already attempted Microsoft business support phone lines, Authenticator restore and recovery, and existing desktop sessions, but support queues are disconnecting and I cannot open business support tickets because the admin account itself is MFA locked.
Tenant: lowepfg.onmicrosoft.com
What is the fastest recovery or escalation path to force MFA reset or re-register Microsoft Authenticator for the tenant admin account?
2 Replies
This is not a support forum. Call support, it's the only way you can regain access (after some thorough validation, of course). If for some reason you cannot use the phone support, try posting over at Q&A instead:
https://learn.microsoft.com/en-us/answers/tags/455/microsoft-security-entra-entra-id
Yeah, I'll try the Q&A mate because I can't log into the support to call them because I can't log into my business account!
Yeah, wasn't sure I'd get help here either but, you know, I had no other option like I can't get through to them, I can't get help. I've been locked out for a couple of days now.
