Demote a Windows 2003 DC

Posted on 2011-10-25
Last Modified: 2012-08-13
I have a single domain single DC Windows 2003 R2, IP =
No clients are connected to this domain
Server is also DNS, DHCP, AD. I want ot integrate the server to my corporate domain to make it a DC of my corporate domain

My corposrate domain has 2 DC (WIndows 2008 DC and Windows 2003 DC) is in

What i plan to do:
- demote AD by ADPROMO of the server
- change the IP address of the server to (to be in the same IP range of my corporate network)
- join the corporate domain  
- run ADPROMO to promote this server as a DC of the corporate domain

Is this procedure looks ok?

Thanks you
Question by:gadsad
    LVL 23

    Accepted Solution

    looks ok - but I'd also run a few checks (dcdiag) of your corporate domain first to make sure that there are no errors or problems.

    the length of time it will take to run the DCPROMO etc, you might be as well to re-install Windows from scratch to ensure there is nothing left behind.
    LVL 39

    Assisted Solution

    by:Krzysztof Pytko
    Yes, it's OK. Remember that during decommission process in this case you need to select that this domain was the last domain controller for that domain, to properly decomission domain. But you need to be sure that this domain and its DC is no longer required!

    After that, simply promote your DC as additional DC for existing domain, If you wish, you may follow an article on my blog at

    That's for 2008 but it's similar to 2003

    LVL 41

    Assisted Solution

    Your procedure looks okay, but if there was any garbage left of your server I would just wipe it and reinstall Windows. That's probably better anyway so there aren't any weird permissions lingering on the file system or registry.  

    Author Closing Comment

    thank you to all

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