How to fix the number problem

Hi @Blair, Simeon,

Thank you for posting in Microsoft Q&A Forum.

could you please confirm the type of account you're trying to sign in with? (e.g., personal, education, or business)

Have you followed the steps in this guide to add your account to the Microsoft Authenticator app? How to add your accounts to Microsoft Authenticator,

In the meantime, if you're using education or business account and you're an end-user, I would recommend you contact your account's Admin to reset your MFA settings through the Microsoft Entra Admin Center. Ask your administrator to follow these steps to revoke MFA sessions and require re-register in the Microsoft Entra admin center.

For step-by-step details, see the official Microsoft documentation: Manage authentication methods for Microsoft Entra multi-factor authentication - Microsoft Entra ID | Microsoft Learn.

If you’re unsure who the Global Admin is within your school account's organization, you can find guidance on locating them here: How do I find my Microsoft 365 admin? - Microsoft Support .

I hope this helps. Thank you for your time, I'm looking forward to your response.

If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment". 

Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.