How easy is it to remove an Active Directory domain and re-install?

Posted on 2009-02-18
Last Modified: 2012-05-06
HI, i have a test lab which currently has 5 very small domains, (2 - 3 machines each, just for testing software). I want to add a parent domain which could host MS Exchange and Windows Update server and Anti Virus etc. Once i've created the parent domain i would like to add the other 5 below it. I would prefer to delete the other domains one by one because they need updating (Im a software engineer and they were my first attempts at Systems work and the DNS is all over the place) So my plan would be to remove each machine from a domain and then somehow delete the domain so i can install a new one (New name, child of new parent domain and then add the machines back in) and then re setup the dns. Can anyone please let me know the easiest way to remove these domains
Question by:Jonesey007
    LVL 65

    Accepted Solution

    Just switch the machines in to a workgroup and reboot.
    Then on the domain controllers run dcpromo which will either set them as a member server (if there are other domain controllers in the domain) or a workgroup member if they are the last DC in the domain.


    Author Comment

    Thanks for the quick reply, so once i've fun dc promo, will all the AD History be removed?
    LVL 58

    Assisted Solution



    Once you have run dcpromo on each of the servers, they will be demoted and will no longer act as Domain Controllers. Once all the servers are demoted, none of them will contain a trace of the Active Directory information from the old domains. You can then rejoin them to the new domain and rebuild the AD structure.


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