rejoining a domain controller to the same domain.

Posted on 2007-08-01
Last Modified: 2013-12-05
A Domain controller on the domain had it's account reset, since then dcpromo was run on that domain controller, and active directory has been removed from that domain controller. the computer account has been removed from the PDC. How do you rejoin a domain controller to the domain.
Question by:cciavola
    LVL 51

    Expert Comment

    Run DCPROMO again.

    Remove all DNS entries for the old DC and delete it from AD Sites and Services first.

    Author Comment

    when i run DCPROMO, it acts as if it were never nun before and gives the error:
    active directory installation failed
    the operation failed because:
    the directory service failed to replicate off chances made locally.
    the DNA operation is unable to procede because of a DNS lookup failure.

    Author Comment

    ok, I missunderstood someone here active directory is still installed on the domain controller but the account has been removed from the PDC.
    LVL 10

    Expert Comment

    by:Walter Padrón
    You must demote the domain controller and clean the AD before you rejoining

    LVL 70

    Expert Comment

    You must first make sure the machine does not think it is a domain controller any more - to do this run DCPROMO again fo demote the machine. If you fails to demote then use the DCPROMO /forceremoval option.

    You also need to make sure it is gone from Active directory see

    Once this has been done then you can add it back again.
    LVL 51

    Accepted Solution

    OK, so you've got all the info you need now.

    DCPROMO /forceremoval
    MetaData cleanup
    DNS cleanup
    AD Sites and Services cleanup

    Wait for at least one replication cycle to converge.  Depending on your infrastructure this could be as long as 2 hours.

    Retry DCPROMO to bring the server back into the domain as a DC.


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