Authenticator app

Hi @Rxzvxn M

May I know whether you recently changed phones, reinstalled the Microsoft Authenticator app, or no longer have access to the device that was previously registered for MFA?

As far as I know, this can sometimes happen after switching to a new device, replacing a phone, reinstalling the Microsoft Authenticator app, or if the authenticator token becomes corrupted. If so, your Multi-Factor Authentication (MFA) registration may need to be revoked and re-registered.

Because you're using a school account, the MFA settings are managed by your university's IT administrator. Unfortunately, this isn't something that can be reset from the user side. I'd recommend reaching out to your university's IT administrator and explaining that you're unable to sign in because you're stuck with the Microsoft Authenticator app and are no longer receiving authentication prompts or codes.

If you're unable to find your IT admin, you may want to contact your school's help desk, a teacher, or another appropriate staff member to determine who is responsible for managing student accounts within your organization.

If you are unsure who your IT administrator is, you can refer to this official Microsoft guide for assistance: How do I find my Microsoft 365 admin? - Microsoft Support .

You can specifically ask whether they can:

• Reset your MFA settings
• Require MFA re-registration
• Remove your existing Authenticator registration so you can set it up again

You may also want to share the following Microsoft article with them: Manage authentication methods for Microsoft Entra multifactor authentication - Microsoft Entra ID | …

Once your IT administrator resets your MFA registration, you should be able to sign in again and go through the Microsoft Authenticator setup process from the beginning, including scanning a new QR code on your device.

I hope this points you in the right direction. If you receive any updates from your IT team or run into any issues along the way, feel free to reply back with more details and I'll be happy to help further.

You will probably need your school to reset your mail account. Contact them for support.