Recently we have found that users are having the error code 500121 while login into the Azure portal, and the issue is coming with MFA (Multifactor Authentication).
During our research, we have found that this error mainly occurs when authentication fails as part of the multi-factor authentication (MFA) request.
There are two possibilities for this error, whether this is a configuration error or a service error.
If you are also having this error then in this post we are going to share all the details regarding this error.
How To Fix MFA Error Code 500121 While Login To Azure portal?
Fix 1: Reset MFA For The User
The best workaround for this error is resetting the MFA for your user. And then re-register the MFA.
Try this workaround and check if it helps you or not.
Fix 2: Clear Cache
If you still have the error even after resetting MFA for your users then try clearing the cache.
If the issue is coming because of any cache issue then clearing the cache should fix the error.
Fix 3: Try Other Device Or Browser
If the error still occurs then we will suggest you to try using any other browser or any other device.
This way you can find out if this is a device related issue, or if there is something wrong with MFA authentication.
Fix 4: Contact Support
If you still have the error at this stage then we will suggest you to contact the support team so they can inspect the error and share with you the possible workarounds.
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