Globaler Administrator kein Zugriff auf AdminCenter-MFA

Hello,

I am the administrator of a Microsoft 365 Business tenant and I am completely locked out of the Microsoft 365 Admin Center.

The administrator account is protected by Microsoft Authenticator. The Authenticator registration was on my previous mobile phone, which I no longer have.

I still know the username and password. After signing in, Microsoft requires me to approve the sign-in in Microsoft Authenticator or enter a verification code. I cannot do either because I no longer have access to the previously registered Authenticator.

I have installed Microsoft Authenticator on my new phone, but I cannot register the account because registration itself requires the existing MFA verification.

I do not have access to another administrator account that can reset my authentication methods.

I therefore need assistance with a Global Administrator MFA reset / tenant recovery so that I can regain access to the Microsoft 365 Admin Center and register Microsoft Authenticator on my new device.

Please let me know how I can securely provide the tenant and account information required to verify ownership. I will not post sensitive tenant or account information publicly.

Thank you.