Microsoft Azure Authentication and microsoft app verification code

To regain access to your Microsoft Azure account after losing access to your Microsoft Authenticator app, you can follow these steps:

1. Contact Microsoft Data Protection Support: Since you are the sole Global Administrator and cannot access the Azure portal, your best option is to reach out to Microsoft Support directly. You can do this by calling their Global Customer Service phone number. Make sure to explain your situation clearly and mention that you are the only admin who has lost access to the account.
2. Prepare for Verification: Be ready to provide any necessary information that can help verify your identity and ownership of the account. This may include domain ownership details, subscription information, billing verification, and any other relevant details.
3. Follow the Support Agent's Instructions: Once you are connected with a support agent, they may escalate the issue to the Data Protection team, who can assist you in resetting your MFA and regaining access to your account.
4. Alternative Method: If you are unable to reach a live agent, consider creating a temporary account by signing up for a trial subscription. This will allow you to access the admin console of the new tenant and submit a support ticket on behalf of your original tenant.

These steps should help you in recovering your account access.

References:

• Global Admin Locked out - Microsoft Q&A
• How Do I Regain Access to My Account After Losing Access to Microsoft Authenticator? (Urgent Request). - Microsoft Q&A