Event ID 40960 RRS feed

  • Question

  • I have an old Windows 2003 Server that was formerly a domain controller, but has been demoted. I haven't killed it yet due to other functions that we need it for. But I keep seeing this error popping up in Event Viewer referencing the new DC's which are running Server 2012 R2.

    "The Security System detected an authentication error for the server ldap/ The failure code from authentication protocol Kerberos was "The attempted logon is invalid. This is either due to a bad username or authentication information.

    I run a dcdiag on the new DC's and everything checks out including ldap tests. I'm not seeing anything unusual that I can tell in Event Viewer on the new DC's. Is this something I should be concerned about?

    Wednesday, July 17, 2019 3:52 PM


  • Not sure what you're talking about here. Have you rebooted since making changes?




    Regards, Dave Patrick ....
    Microsoft Certified Professional
    Microsoft MVP [Windows Server] Datacenter Management

    Disclaimer: This posting is provided "AS IS" with no warranties or guarantees, and confers no rights.

    • Marked as answer by KAG PMW Wednesday, July 24, 2019 1:19 PM
    Tuesday, July 23, 2019 12:53 PM

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