Cannot Access Azure Portal Due to Missing Authenticator App

To regain access to your Azure Portal without the Authenticator app, you can follow these steps:

1. Use Alternative Verification Methods: If you have set up other security verification options (like email or SMS), try selecting Other verification options on the sign-in page to use those methods instead.
2. Contact an Admin: If you are part of an organization, ask another global admin to reset your Multi-Factor Authentication (MFA) settings. They can do this by going to the Azure portal, selecting your user account, and managing the authentication methods.
3. Reset MFA Settings: If you are the only admin, you may need to contact Microsoft support for assistance in resetting your MFA settings. You can reach out to the Azure Data Protection team or the Microsoft 365 Data Protection team for help.
4. Check User Settings: If you have access to the Microsoft security settings through another account, ensure that your email and mobile numbers are correctly configured. This might help in receiving codes for verification.

If these options do not work, contacting Microsoft support directly would be the best course of action to regain access to your account.

References:

• Can't use Azure Multi-Factor Authentication to sign in to cloud services after you lose your phone or the phone number changes
• Troubleshoot sign-in issues and account access problems