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Thread: The Security Account Manager failed a KDC request

  1. #1
    Join Date
    Jul 2006

    The Security Account Manager failed a KDC request

    I recently build a new Windows 2003 SP2 DC and after restart I am getting hte below error message. I have also seen this error message on another DC in my forest again after a restart. It will not appear any other time. Can anyone tell me how to solve this issue? Thanks

    Event Type: Error
    Event Source: KDC
    Event Category: None
    Event ID: 7
    Date: 18/03/2009
    Time: 08:12:33
    User: N/A
    Computer: My-DC2
    The Security Account Manager failed a KDC request in an unexpected way. The error is in the data field. The account name was ldap/ and lookup type 0x48.

    For more information, see Help and Support Center at
    Data: 0000: 17 00 00 c0

  2. #2
    Join Date
    Jan 2006
    To verify that the local Security Accounts Manager (SAM) database is available to authentication requests from the Key Distribution Center (KDC), ensure that a Kerberos ticket was received from the KDC and cached on the local computer. You can view cached Kerberos tickets on the local computer by using the Klist command-line tool. More information here -

  3. #3
    Join Date
    Dec 2007

    Re: The Security Account Manager failed a KDC request

    You need to attempt to restart the Kerberos client pc to check the result. To get more information you need to refer to the below Microsoft TechNet article to solved the case:

    Event ID 7 — Security Accounts Manager Availability

    If the above doesnt work then check the other article on how to reset the secure channel from this link:

  4. #4
    Join Date
    Jun 2009

    Re: The Security Account Manager failed a KDC request

    There is also a problem of Low Disk Space if there are any errors caused. There was a guy at our office who complained about not being able to log onto the server. After checking the event logs I noticed that it was filled with these errors. Also after searching a lot for some other failure I also found that the C: Drive in my computer was only having 50mb free storage.

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