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computer: the requested object as a non-unique identifier error

All replies

  • Hi Reno,

    Are there multiple domain controllers in the domain?

    Is there any domain controller restored with unsupported restore method?

    Please run DCdiag.exe and Repadmin.exe to examine DC and AD replication status, then post out error messages for further troubleshooting.

    Best Regards,

    Amy


    Please remember to mark the replies as answers if they help.
    If you have feedback for TechNet Subscriber Support, contact tnmff@microsoft.com.

    Thursday, March 23, 2017 6:58 AM
    Moderator
  • dcdiag and repadmin both didn't return any errors.

    i have 2 DC in main site and 1 DC in DR site.

    what you mean by "unsupported restore method"?

    regards,

    Reno

    Thursday, March 23, 2017 12:07 PM
  • Hi Reno,

    Supported methods for Active Directory restore are to restore the system state with Active Directory-aware backup and restoration utility.

    Otherwise, USN rollback issue would occur, and needs to be resolved by demote the problematic DC or restore the DC with supported method.

    You may check more details here within this KB article below:

    How to detect and recover from a USN rollback in Windows Server 2003, Windows Server 2008, and Windows Server 2008 R2

    https://support.microsoft.com/en-us/help/875495/how-to-detect-and-recover-from-a-usn-rollback-in-windows-server-2003,-windows-server-2008,-and-windows-server-2008-r2

    Best Regards,

    Amy


    Please remember to mark the replies as answers if they help.
    If you have feedback for TechNet Subscriber Support, contact tnmff@microsoft.com.

    Tuesday, March 28, 2017 10:36 AM
    Moderator
  • hi,

    there are no restore done on DC servers. the problem happens with a member server only.

    i ran that "repadmin /showutdvec" and all USN's are same except some entries have unknown in the date/time column.

    Tuesday, March 28, 2017 11:08 AM