MFA & Verification Issues

Fix Microsoft Authenticator Requesting MFA Registration on Every Login

Maira Mehtab Sep 22, 2026 870 views

Question details

The user is stuck in a loop where Microsoft 365 continuously prompts them to register for two-factor authentication (MFA), even though an authenticator app is already set up.

Product: Microsoft 365
Device & OS: not provided
Scenario: Signing into a Microsoft 365 organizational or school account.
Observed behavior: The system fails to recognize the existing MFA configuration and demands re-registration on every login attempt.

Before you start

Ensure that your Microsoft Authenticator app is updated to the latest version and that your mobile device's date and time are set to update automatically, as time synchronization issues can cause MFA failures.

Solution 1Recommended

Request Administrator to Review Entra ID Policies

Infinite MFA registration loops are usually caused by conflicting conditional access policies or trusted device settings in the organization's Microsoft Entra ID (formerly Azure AD).

In enterprise environments, MFA prompts are controlled by administrator-defined policies. If a policy forces MFA re-registration but conflicts with the existing setup, the user will experience an endless loop.

Contact IT Support

Reach out to your organization's IT support or Microsoft 365 administrator and describe the recurring MFA registration loop.

Review Conditional Access

Ask the administrator to review the Authentication Registration policies and Conditional Access policies in the Microsoft Entra admin center for any conflicts.

Check Sign-in Logs

Request the administrator to check the sign-in logs under your user profile to identify the specific policy triggering the repeated registration prompts.

Clear MFA Sessions

Have the administrator revoke your existing MFA sessions and uncheck any 'Require re-register MFA' flags for your user account.

Admin Access Required: End users typically cannot resolve policy loop issues on their own; administrative access to Microsoft Entra is required to adjust conditional access settings.

Solution 2

Delete and Re-register MFA Methods

Manually removing your old MFA methods and setting them up from scratch might break the continuous loop if the current configuration is corrupted.

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Frequently Asked Questions

Why does Microsoft 365 keep asking for more information during login?

This usually happens because your organization's security defaults or Conditional Access policies require MFA registration to be refreshed periodically, or the system does not currently recognize your device as a trusted entity.

How do I stop the Microsoft Authenticator app from asking to approve sign-ins repeatedly?

If you are experiencing constant unsolicited approval prompts, someone might be attempting unauthorized access to your account. Change your account password immediately and review your recent sign-in activity in the Microsoft security dashboard.

Does clearing my browser cache help with MFA login loops?

Yes, corrupted session cookies can sometimes cause repetitive login prompts. Clearing your browser's cache and cookies, or trying to log in via an Incognito/InPrivate window, can help rule out browser-related caching issues.

Can I bypass the MFA registration prompt if I am an administrator?

If you are an admin locked out by an MFA loop, you will need to use your emergency access (break-glass) account to log in, or contact Microsoft Data Protection support to reset your tenant's MFA requirements.

Login & Account Issues