Unable to use Authenticator authentication when logging into the administrator account

If you're unable to use the Microsoft Authenticator for authentication when logging into the administrator account, you may need to troubleshoot a few potential issues. Here are some steps you can take:

1. Check for Pending Notifications: Sometimes, there might be a pending verification request in the Authenticator app. Open the app and respond to any prompts.
2. Verify Phone Number: Ensure that the phone number associated with the account is correct and that the device is capable of receiving calls or texts.
3. Re-register the Authenticator: If you need to reset and rebind the phone for authentication, you can do this by:
   • Going to Security info and signing in.
   • Selecting Add method > Authenticator app to re-register the Authenticator app.
   • Following the instructions to set it up again.
4. Contact Admin: If you are still unable to access the account, reach out to your organization's Microsoft Entra administrator for assistance. They can help unblock your account or reset your authentication methods.
5. Troubleshoot Common Issues: If you encounter specific error messages, refer to troubleshooting steps for common issues related to phone authentication in Microsoft Entra ID.

By following these steps, you should be able to resolve the issue with the Authenticator app and regain access to your administrator account.

References:

• Troubleshooting phone options
• User registration

we can not Going to Security info and signing in Because Authertictor authentication is still required to log in, but we are unable to authenticate, so we are unable to log in