MFA & Verification Issues

How to Fix Microsoft Fabric Sign-In Loop and Authentication Errors

Maira Mehtab Oct 9, 2026 868 views

Question details

The user is experiencing an infinite sign-in loop and authentication errors when attempting to log into a new Microsoft Fabric account.

How to Fix Microsoft Fabric Sign-In Loop and Authentication Errors

Product: Microsoft Fabric
Device & OS: not provided
Scenario: Attempting to sign in to a newly created Microsoft Fabric account but failing at the authentication stage.
Observed behavior: The sign-in process repeatedly loops and never completes authentication, indicating that the multifactor authentication (MFA) method may be inaccessible or incorrectly configured.

Before you start

Before proceeding, try signing into your account using an incognito or private browsing window to ensure the sign-in loop is not caused by corrupted browser cookies or cache.

Solution 1Recommended

Request an MFA Reset from Another Administrator

If you share admin privileges or are an end-user, the fastest way to resolve an MFA lockout is to have another active administrator reset your authentication methods.

Microsoft Entra administrators have the ability to manage user authentication options. Re-registering your MFA will force the system to prompt you for a new verification setup upon your next login.

Contact an active administrator

Reach out to another Microsoft Entra or IT administrator within your organization.

Navigate to Microsoft Entra admin center

Ask the administrator to sign in to the Microsoft Entra admin center and go to Identity > Users > All users.

Locate user profile

Have them search for your specific user account and select 'Authentication methods' from the left-hand menu.

Require MFA re-registration

The administrator must click 'Require re-register MFA' to clear your current stuck authentication methods, allowing you to set them up again during your next sign-in.

Request an MFA Reset from Another Administrator

Solution 2

Contact Microsoft Data Protection Support

If you are the only administrator for your tenant and cannot sign in, you must contact Microsoft phone support for identity verification and account recovery.

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Frequently Asked Questions

Why does my Microsoft Fabric account keep looping during sign-in?

Sign-in loops typically occur when there is a mismatch or configuration error with your Multi-Factor Authentication (MFA), a corrupted browser cache, or temporary syncing issues within Microsoft Entra ID.

How do I find out who my organization's administrator is?

If you are using a work or school account, your administrator is generally the IT department or the individual who provided you with your login credentials. You can also check your internal company directory for IT support contacts.

Can Microsoft community moderators fix my sign-in loop?

No. Community moderators do not have backend access to Microsoft tenant data or user accounts. You must either contact another internal administrator or reach out to Microsoft's Data Protection phone support.

Login & Account Issues