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How to Fix Azure Error 500121 When Authenticator Notifications Fail
Question details
The user is unable to access the Azure portal due to an authentication failure caused by missing Microsoft Authenticator push notifications.
- Product
- Microsoft Azure
- Device & OS
- not provided
- Scenario
- Logging into the Azure portal with multi-factor authentication (MFA) enabled.
- Observed behavior
- The sign-in attempt fails with error 500121 because the required Microsoft Authenticator approval prompt is never received on the user's device.
Before proceeding, ensure your mobile device has an active internet connection and that system notifications are enabled for the Microsoft Authenticator app. Please avoid making repeated sign-in attempts, as this can trigger a temporary security lockout on your account.
Ask a Global Administrator to Reset Your MFA Registration
The most efficient way to resolve this issue is by having another global administrator reset your multi-factor authentication settings so you can set up the app again.
Since this is an enterprise-level Azure multi-factor authentication issue rather than a consumer account problem, standard password resets will not fix it. An administrator must intervene to clear your current MFA sessions.
Reach out to another Global Administrator or your organization's IT helpdesk who has access to the Azure Active Directory (Entra ID) portal.
Ask the administrator to navigate to 'Users', search for your specific account, and open your profile settings.
Instruct the administrator to select 'Authentication methods' and click 'Require re-register MFA'. Once done, attempt to log in again to trigger a fresh setup of your Microsoft Authenticator app.
Contact Microsoft Azure Support
If you are the only global administrator or cannot reach another admin, you must contact Microsoft Support to regain access to your tenant.
Work Without Interruptions Using WPS Office
While you are waiting for your Azure authentication issues to be resolved, don't let cloud lockouts stop your productivity. WPS Office offers a powerful, lightweight, and free alternative to Microsoft Office that allows you to create, view, and edit your documents completely offline without requiring complex cloud sign-ins.
- 1. Download the Installer: Visit the official WPS Office website and click the free download button for your operating system.
- 2. Install the Software: Run the setup file and follow the quick on-screen instructions to install the suite.
- 3. Open Your Documents: Launch WPS Office and instantly open your existing Microsoft Office files to continue working offline.
Frequently Asked Questions
What exactly does Azure Error 500121 mean?
Error 500121 means that authentication failed because the multi-factor authentication (MFA) requirement was not successfully met. This usually happens when the prompt is denied, the user fails to respond in time, or the notification never reaches the device.
Why is my Microsoft Authenticator app not receiving push notifications?
Push notifications can fail if your phone is in battery saver mode, background data is restricted for the app, or your device has an unstable network connection. It can also happen if the MFA token on the Azure server has become desynchronized from your app.
Can I bypass the Microsoft Authenticator app to log in?
You cannot bypass the Authenticator requirement if it is strictly enforced by your organization's Conditional Access policies. However, if you previously set up alternative methods (such as SMS or a secondary email), you can click 'Sign in another way' on the login screen to use them.
