Sole Global Administrator locked out due to lost Microsoft Authenticator MFA

I am the sole Global Administrator of a Microsoft 365 / Microsoft Entra tenant.

I no longer have access to the Microsoft Authenticator registration associated with the administrator account.

The password is correct, but the only available verification methods are:

• Approve a request in Microsoft Authenticator
• Use a verification code from Microsoft Authenticator

There is no “Sign in another way” option, no alternate MFA method, and no second Global Administrator.

Because of this, I cannot access the Microsoft 365 Admin Center, Entra Admin Center, or Partner Center to reset MFA.

I need guidance on the correct recovery process for a sole Global Administrator tenant lockout and how to get the case escalated to Microsoft Data Protection / Tenant Recovery for tenant ownership verification and MFA re-registration.

I am ready to provide domain ownership proof, business registration information, billing/subscription information, DNS verification, or any other required proof privately to Microsoft Support.

Alternate contact email:

<mod: PII removed>@gmail.com

Contact number: <mod: PII removed>

Please contact me privately if tenant-specific information is required.