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DHCP server unauthorized automatically. Event ID 1046 [OS Ver: WIN2K8]

    Question

  • Hi Experts,

    One of our DHCP server suddenly stopped working and when we checked, we found it got unauthorized automatically and on event viewer we found Event ID 1046 triggered for this un-authorization. 

    This DHCP server was working for long time and we would like to understand sudden unauthorization reason

    I found these below url's but none of these posts leads to the root cause.

    https://social.technet.microsoft.com/Forums/windows/en-US/5574060e-733b-42ff-a820-6221ce4bc126/dhcp-and-event-id-1046?forum=winserverNIS

    https://support.microsoft.com/en-us/kb/938456

    We were able to authorize the same server without following the above KB article and the issue didn't reoccur .

    ---------------------------------------------------------------------------------------------------------------------------------------

    Event viewer error message:

    Event ID 1046

    The DHCP/BINL service on the local machine, belonging to the Windows Administrative domain asia.ad.flextronics.com, has determined that it is not authorized to start.  It has stopped servicing clients.  The following are some possible reasons for this:

    • This machine is part of a directory service enterprise and is not authorized in the same domain.  (See help on the DHCP Service Management Tool for additional information).
    • This machine cannot reach its directory service enterprise and it has encountered another DHCP service on the network belonging to a directory service enterprise on which the local machine is not authorized.
    • Some unexpected network error occurred



    Regards, Nidhin.CK


    • Edited by Nidhin CK Wednesday, December 7, 2016 10:31 AM title change
    Wednesday, December 7, 2016 10:31 AM

All replies

  • Hi Nidhin CK,

    Please open ADSI on DC, then connect to "Configuration" container

    Then expand CN=Services, CN=NetServices:

    The authorized DHCP server will show up in the place, you may check if there are objects with "CNF" or "GUID", these objects are duplicated objects, if there is, then, delete them and restart DHCP server and reauthorize DHCP server.

    Best Regards,

    Anne


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

    Thursday, December 8, 2016 7:30 AM
    Moderator
  • Hi,

    Could the above reply be of help, if yes, you may mark useful reply as answer, if not, feel free to feedback.

    Best Regards,

    Anne


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

    • Proposed as answer by Buddha_dasa Tuesday, January 2, 2018 11:28 AM
    Monday, December 19, 2016 2:40 AM
    Moderator