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Connection to Azure Active Directory failed due to authentication failure. RRS feed

  • Question

  • We are receiving email alert "Connection to Azure Active Directory failed due to authentication failure." but this clears in due course without any intervention. Does anyone know why this might happen please?
    • Edited by WT101 Tuesday, April 30, 2019 4:33 PM
    Tuesday, April 30, 2019 4:33 PM

All replies

  • Check the Authentication Agent event logs on the server and they should give you the information that you need to resolve this issue. 

    Open up the Event Viewer application and check under

    Application and Service Logs\Microsoft\AzureAdConnect\AuthenticationAgent\Admin

    You can also look for detailed trace logs under

    %ProgramData%\Microsoft\Azure AD Connect Authentication Agent\Trace\.

    These logs will give specific reasons why an authentication failed. There could be a connectivity, firewall, or policy condition that is causing the authentication to work in some cases and not in others. 

    https://docs.microsoft.com/en-us/azure/active-directory/hybrid/tshoot-connect-pass-through-authentication

    Tuesday, April 30, 2019 9:32 PM
    Moderator
  • Please let me know if you find above reply useful. If yes, do click on 'Mark as answer' link in above reply. This will help other community members facing similar query to refer to this solution. Thanks.
    Friday, May 3, 2019 12:38 AM
    Moderator