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I'm encountering an issue with Azure AD authentication and need assistance resolving it. Below are the details of the error:
Error Code: 500121
Request Id: 65a0a6cf-aa79-4096-800e-bbe99c1b7800
Correlation Id: e2ff1368-41aa-4edb-8716-a3ff3deabb2b
Timestamp: 2024-11-27T11:51:38Z
This error occurs when users try to sign in to a particular application using Azure AD. It seems to be related to conditional access or multi-factor authentication (MFA) policies, but I'm unsure of the exact cause.
I have checked the sign-in logs and found this error code frequently, but I'm not able to pinpoint the issue. Could someone guide me on how to troubleshoot this further or share possible solutions for this error?
Any insights or suggestions would be greatly appreciated!
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@Moazzem Hossain Just checking in to see if below information was helpful. If you have any further updates on this issue, please feel free to post back.
Hi Moazzem,
Error Code: 500121 indicates Authentication failed during strong authentication request. The user didn't complete the MFA prompt or they may have decided not to authenticate or timed out while doing other work, or has an issue with their authentication setup.
Check if the account MFA is blocked.
Entra ID > Security > Multifactor authentication > Block/unblock users.
Cheers
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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(96, 51%, 19%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EMV%3C/text%3E%3C/svg%3E)
At last the solution I couldn't find. Thanks so much.
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(80, 38%, 17%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EBC%3C/text%3E%3C/svg%3E)
I have the same issue however there is only one account. How can I get it unblocked if I can't login? I have a support subscription, but it is useless unless I can login?!