Microsoft 365 features that help users manage their subscriptions, account settings, and billing information.
Since you were logged out of the Authenticator app, that’s most likely the reason for the issue you’re experiencing. Your account is still set up to use Microsoft Authenticator as the required verification method. When you attempt to sign in, the system expects either an approval or a code from the app. Because the app is no longer signed in or properly linked to your account, it cannot provide the necessary verification.
As this is a work or school account managed by your school’s IT department, forum moderators don’t have the administrative permissions to change these settings directly.
To regain access quickly, the best step is to contact your school’s IT Support or Help Desk. They are the only ones who can reset your multifactor authentication (MFA) settings or help you configure a new verification method. You can refer them to this guide: Manage authentication methods for Microsoft Entra multifactor authentication - Microsoft Entra ID |…
If you’re unsure who your IT administrator is, see How do I find my Microsoft 365 admin? - Microsoft Support
Once your school IT team helps you regain access, you can manage your security verification methods by visiting My Sign-Ins | Security Info | Microsoft.com page. This allows you to control which methods you use for MFA in the future.
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.