Microsoft Authenticator App

Hi @R.J. Martinez,

It sounds like your school account was previously registered with Microsoft Authenticator, but after getting a new phone you were unable to transfer the MFA setup. Since you can no longer access the authentication method associated with the account, you're now unable to complete the sign-in process.

In this situation, the best course of action is to contact your school's IT administrator. They can reset your multi-factor authentication (MFA) registration, allowing you to set up Microsoft Authenticator again on your new phone.

You can kindly ask them to follow the steps in this guide to revoke your existing MFA sessions and require re-registration: Manage authentication methods for Microsoft Entra multifactor authentication - Microsoft Entra ID |…   

This process usually only takes a few minutes. Once completed, your previous MFA registration will be cleared, and the next time you sign in, you'll be prompted to set up Microsoft Authenticator again on your new phone.

As this is a user-to-user support forum, I can only offer steps based on my experience and how similar cases are typically resolved, rather than making direct changes. In your case, the account is entirely managed by your school, and only those with the appropriate administrative permissions can modify its security settings. 

That said, I sincerely hope this information will help direct you to the correct support team so you can regain access to your account as soon as possible and continue your studies without further interruption. 

Thank you again for your time and understanding. 

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