Dear @Rashida Shafi,
Thank you for posting your question in the Microsoft Q&A forum.
I understand how frustrating it is to be stuck when the system asks for approval from Microsoft Authenticator that you can no longer access.
Based on your description, this is happening because your university (educational) Microsoft account still has Microsoft Authenticator registered as the required security method. Since the account was removed from the Authenticator app, the sign‑in process is now asking you to approve a request that you’re unable to receive.
In this case, since you are using school or university‑managed account, I highly recommend you contact your school IT staff directly so that they may reset your MFA settings to your new mobile number. You might also ask whether your MFA can be temporarily disabled to allow an emergency sign-in.
For that reason, the school IT admin can Revoke MFA sessions and require re-registration in Microsoft Entra admin center
For more information and instruction, please ask the school IT Admin to follow the Microsoft Official Guide here: Manage authentication methods for Microsoft Entra multifactor authentication - Microsoft Entra ID | Microsoft Learn
If you do not know who your school IT is admin, please refer to this Microsoft document here: Find the administrator for your work or school account
Note: Please understand that as a forum moderator, my role is to provide general guidance and troubleshooting support. I don’t have access to internal systems or backend tools to resolve backend/account issues. I appreciate your understanding of these limits.
I hope the information shared helps point you in the right direction. Please try the steps above and let me know if they work. If not, we can continue working together to narrow this down.
The first response may not always resolve the issue right away, but with your help and more details, we can work toward a solution.
Thank you for your patience and understanding. I'm looking forward for your reply.
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