Hi @Antonio Macias,
Good day! Thank you for reaching out to Microsoft Q&A forum and sharing the detail.
Regarding to your issue, if you have a backup sign-in method configured. If you previously set up alternative authentication methods (for example, SMS text message, phone call), please try signing in using one of those options:

When prompted, choose an alternative verification method you had set up previously (e.g., Text a code, Call my phone).
If you do not have access to any backup method, you need to reach out your IT administrator.
If your account is not an admin account or not only admin, please reach out to your IT department of your organization and request that they can revoke your current session and reset your authentication method.
Please have your administrator follow the steps shown in the following article:Manage authentication methods for Microsoft Entra multi-factor authentication - Microsoft Entra ID …
- They will sign in to the Microsoft Entra admin center as at least one Authentication Administrator.
- User > choose all user.
- Select the user you want to act on (your account), and select Authentication methods. then select Require re-register of multi-factor authentication.
- Require re-register MFA: This disables all previous authentication methods. You'll then be prompted to configure a new MFA authentication method the next time you try to sign in, so you can add a new authenticator app.
-

If your account is the only 1 admin account, you'll need to contact the Microsoft Data Protection team. In this situation, the Microsoft Data Protection team has tools and processes in place to verify identity and regain access to administrator accounts. Please try to find the related hotline number to call the frontline let them raise a ticket for you: Customer service phone numbers - Microsoft Support
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I hope the information provided proves useful. Please proceed with the outlined steps and let me know whether they resolve the issue. If not, I’ll be glad to continue working with you to find a solution.
Thank you for your patience and understanding throughout this process. Should you have any questions or need further assistance, feel free to reach out at any time. I look forward to hearing from you.
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