Troubleshoot My Authenticator App

To remove your Microsoft Authenticator app or device from the system, you typically need to reset your multi-factor authentication (MFA) settings. Here are the steps you can follow:

1. Contact Global Admins: If you are part of an organization, reach out to the Global Admins of your tenant. They can help you reset your MFA settings or remove the authenticator app from your account.
2. Re-register MFA: Ask the Global Admins to require you to re-register for MFA. This will allow you to set up the authenticator app again.
3. Use Microsoft Graph API: If you have administrative access, you can use the Microsoft Graph API to delete the authenticator app associated with your account. This requires some technical steps, including making a DELETE request to the appropriate endpoint for your user account.

If you are unable to access the Global Admins or need immediate assistance, consider contacting Microsoft Support for further help.

References:

• I need to reset my mfa methods - Microsoft Q&A
• Can't set up MFA because five devices are already registered to use an authenticator app