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App Registered with Azure AD suddenly fails login after permission grant prompt

Matthew Strobel 1 Reputation point
2021-07-13T13:33:34.767+00:00

This issue has started suddenly after working for over 6+ months. The registered application is a custom-built internal application that is registered with Azure AD to limit access to only users within the directory. After successful sign in to Microsoft, the Permission requested promptly is displayed and after selecting allow a 'login failed' screen is displayed. The error which is returned to the webserver is a 50000 stating that the token is invalid or the login service is down.

Has anyone else experienced this issue, or have any insight into what would cause this to suddenly occur after no changes were made in the web application or the AD registration settings. Thank you.

Microsoft Entra ID
Microsoft Entra ID
A Microsoft Entra identity service that provides identity management and access control capabilities. Replaces Azure Active Directory.
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  1. Marilee Turscak-MSFT 37,056 Reputation points Microsoft Employee
    2021-07-13T19:34:20.297+00:00

    The guidance for the AADSTS50000 Token Issuance error from the documentation is to open a support ticket. It might be a service error.

    If you have any other errors in the console you can share, I can also help further troubleshoot.

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