MFA & Verification Issues

Fix Microsoft Authenticator Sign-In Loop on Mobile Devices

Camila Milosovich Oct 10, 2026 869 views

Question details

The user is stuck in a continuous sign-in loop between Microsoft 365 and the Microsoft Authenticator app on the same mobile device, with no alternative verification methods accessible.

How to Fix Microsoft Authenticator Sign-In Loop on a Mobile Device

Product: Microsoft Authenticator
Device & OS: not provided
Scenario: Attempting to sign into a Microsoft 365 school or work account using a mobile device.
Observed behavior: The sign-in process repeatedly redirects to the Authenticator app, asking for a code from the same device, creating an infinite loop that prevents login.

Before you start

Ensure you have your school or organization's IT support contact details ready, as you will need administrative assistance to bypass the loop.

Solution 1Recommended

Request a Multifactor Authentication Reset from Your IT Department

Since alternative methods are locked behind the Authenticator app, your school or organization's IT administrator must intervene to reset your authentication settings.

When an account is caught in an authentication loop on a single device, it usually means the primary and secondary verification methods are conflicting or pointing to the same inaccessible app. End-users cannot bypass this security measure themselves for organizational accounts.

Gather your account details

Note down your Microsoft 365 email address and the specific loop behavior you are experiencing to explain the issue clearly.

Contact IT support

Reach out to your school or company's IT helpdesk via phone, an alternative email address, or an in-person visit.

Request an MFA reset

Ask the administrator to clear your current multifactor authentication methods and provide a temporary login pass or an alternative verification option.

Re-register your device

Once the account is reset, log into your Microsoft 365 portal on a computer and set up the Microsoft Authenticator app from scratch on your mobile device.

Request a Multifactor Authentication Reset from Your IT Department

Admin Access Required: Only administrators with access to the Microsoft Entra ID (formerly Azure AD) portal can reset MFA methods for school or work accounts.

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Switch to WPS Office for a Hassle-Free Experience

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Frequently Asked Questions

Why does the Microsoft Authenticator loop happen?

This usually occurs when the Authenticator app loses its connection token with the server, or when the account's primary and secondary verification methods point back to the same app on a single device, creating a cyclic dependency.

Can I reset my own Microsoft 365 MFA methods?

For personal Microsoft accounts, you can manage security settings if you have alternative methods (like SMS or email) set up. For school or work accounts, only the IT administrator has the permissions to reset or modify your MFA settings.

Does reinstalling the Authenticator app fix the loop?

Uninstalling and reinstalling the app usually will not fix the issue and may lock you out entirely if it deletes your local account credentials. Always consult your IT admin to reset the connection before removing the app.

How do I set up a backup verification method to prevent loops?

Once your IT admin restores your access, go to your Microsoft account Security Info page and add a secondary method, such as a phone number for SMS codes or a secondary email address, to ensure you have a fallback option.

Login & Account Issues