DCPROMO to windows 2012


  • We have migrated from windows 2008 R2 AD to windows 2012.

    All the roles have been transferred across PDC, RID schema etc however when the windows 2008 server (previously AD server) was removed we nolonger have access to any of the AD information, just give a message about the specific domain does not exist or cannot be contacted.

    The old server has failed so we cannot bring it back.


    Tuesday, November 05, 2013 1:48 PM


All replies

  • How did you migrate?  Did you let the two servers run side-by-side for a while?  How did you transfer FSMO roles?  I take it that you did not try to simply turn off the old DC after having created the new DC to test it before you deprovisioned the old DC.

    .:|:.:|:. tim

    Tuesday, November 05, 2013 2:01 PM
  • we did have it turned off and all was working fine.

    the roles were all transferred with ntdsutil, and used transfer commands

    Tuesday, November 05, 2013 2:06 PM
  • did you forget a role that was on the old DC, maybe dns, dhcp, or wins, also if you had those roles on the old DC your dhcp scope may have it configured as primary dns or wins, check servers and workstations with static addresses make sure they have proper IP settings for dns and all of them machines that may have had only one dns server may not have a good one at all now.

    Tuesday, November 05, 2013 6:22 PM
  • the dns and dhcp work fine, just cant do anything with ad - cant find domain
    Thursday, November 07, 2013 1:21 PM
  • Hi,

    Based on your descriotion, it seems that the domain accepted the old machine as DC even if the roles have been removed and the old DC demoted. It may be because you had not cleaned up the metadata from the old server.

    In addition, please make sure that the DC in the domain has registered an "A" record for itself in DNS.

    More information:

    Clean Up Server Metadata

    Best regards,


    Monday, November 11, 2013 3:03 AM
  • Thanks - seemed to be the meta data
    Wednesday, November 13, 2013 6:20 AM
  • Hi,

    Good to hear that and have a good day!

    Best regards,


    Wednesday, November 13, 2013 3:34 PM