Windows 2008 AD in Windows 2003 AD Environment

Posted on 2011-05-11
Last Modified: 2012-05-11
Are there any issues with installing a new Windows Server 2008 Domain Controller in an environment where all my other 6 domain controllers are Windows 2003 AD servers?

IF this is possible, thinking if I should stick to 32bit or use the 64bit OS?

Recommendations please?

Thanks in advance.
Question by:OdyChris
    LVL 37

    Accepted Solution

    No issues at all. If the 2008 server is not a domain controller you don't really have to do anything but add the server to the Domain. I prefer 64bit, and if you have Windows 2008 R2, there is no 32bit version of the OS.
    LVL 57

    Assisted Solution

    by:Mike Kline
    Not only is it possible it is what is normally done (you wouldn't demote all 6 2003 boxes at the same time)

    I'd go with 64 bit and go to 2008 R2 which is only 64 bit.

    More details and steps in this question I helped with


    LVL 37

    Assisted Solution

    by:Adam Brown
    Sorry. Misread that the 2008 server is going to be a DC. You'll need to run adprep on one of the 2003 Servers, and you'll need to use the 32bit version of it. After ADPrep is run, there aren't any real issues with having mixed 2003 and 2008 servers. has some info on ADPrep.
    LVL 4

    Assisted Solution

    I could type all this out but it would be easier to send you the link I used when we deployed our first Win2008 server in our 2003AD environment.

    1). You have to "update" your 2003 AD schema (steps listed in the website above).

    2). eventually, you will want to get all roles moved over to your Win2008 AD machine for future growth (when you start killing 2003 machines off and replacing them with 2008 machines).

    3). Use 64 bit OS ... it will work with your 2003 AD machines and it will make your future brighter.
    LVL 4

    Assisted Solution

    2008r2 by default when you create a new tree root.  its default domain/forrest level is 2003.  

    if u descide promote it.  you will not have issues.  just dont upgrade the funtionality level for the domain or forrest.  i would change the fsmo over to the 2008 box for when the company descides to take advantages of its 2008 domain funtions
    LVL 59

    Assisted Solution

    by:Darius Ghassem
    I would have to agree with Mike I would go with Windows 2008 Server R2 which is only 64-bit.

    Here is an article in changes in adprep in Windows 2008 Server R2

    And here is guide to add a Domain Controller of 2008 to 2003 domain

    Write Comment

    Please enter a first name

    Please enter a last name

    We will never share this with anyone.

    Featured Post

    Don't lose your head updating email signatures!

    Do your end users still have the wrong email signature? Do email signature updates bore you or fill you with a sense of dread? You can make this a whole lot easier on yourself by trusting an Exclaimer email signature management solution. Over 50 million users should you!

    [b]Ok so now I will show you how to add a user name to the description at login. [/b] First connect to your DC (Domain Controller / Active Directory Server) SET PERMISSIONS FOR SCRIPT TO UPDATE COMPUTER DESCRIPTION TO USERNAME 1. Open Active …
    I had a question today where the user wanted to know how to delete an SSL Certificate, so I thought that I would quickly add this How to! Article for your reference. WHY WOULD YOU WANT TO DELETE A CERTIFICATE? 1. If an incorrect certificate was …
    This tutorial will walk an individual through the steps necessary to join and promote the first Windows Server 2012 domain controller into an Active Directory environment running on Windows Server 2008. Determine the location of the FSMO roles by lo…
    This tutorial will walk an individual through setting the global and backup job media overwrite and protection periods in Backup Exec 2012. Log onto the Backup Exec Central Administration Server. Examine the services. If all or most of them are stop…

    779 members asked questions and received personalized solutions in the past 7 days.

    Join the community of 500,000 technology professionals and ask your questions.

    Join & Ask a Question

    Need Help in Real-Time?

    Connect with top rated Experts

    14 Experts available now in Live!

    Get 1:1 Help Now