ADPREP 2003 to 2008R2

Posted on 2012-08-27
Last Modified: 2012-08-27
Have a SBS2003 that at some point was upgraded from SBS2000; approx 10+ year old hardware. SBS is no longer needed/desired. Plan on adding new server running Server Standard 2008R2, DCPROMO, seize FSMO roles and use as root DC, and retire SBS2003 server. ADPREP is apparently failing qwith no error messages. Following info discovered and tasks performed.

Found SBS2003 forest/domain functional level at Server2000. Manually upgraded to 2003 thru AD Domains & Trusts. Level now shows 2003 for both. Restart server. Run ADPREP32.exe from Server2008R2 disk. Forestprep, domainprep, and gpprep all indicate they ran successfully. Restart server. Verify functional level thru AD Domains & Trusts - shows forest/domain at 2003. Attempt to manually upgrade to 2008 and receive message that both forest and domain are at highest functional level. Attempt to run ADPREP32 again and receive messages that forest, domaion, and group were already succesfully upgraded.

Can I manually raise server to 2008 functional level so I can DCPROMO new server? SBS2003 is only Domain Controller. An existing server running 2008R2 and the the new server running 2008R2 are both Member servers.
Question by:garfoote
    LVL 38

    Accepted Solution

    You can only raise the functional levels past 2003 when there are no longer any domain controllers that are running Server 2003.  In other words, you can only raise to 2008 level when all your DCs are 2008.

    But the functional level does not need to be 2008 to support a DC running on Server 2008 (or 2008 R2).  You can go ahead and run DCPROMO on your 2008R2 server.

    Author Closing Comment

    Thanks footech for the post. Server is now a DC and I am adding roles in prep for migration. Once Server2003 is offline I will raise functional level and seize all FSMO roles. Thanks again.
    LVL 38

    Expert Comment

    I'm thinking the process you will have to go through is (after everything is set up on the 2008 server and data has replicated):
    - shutdown the 2003 SBS
    - seize the FSMO roles (after you do this you won't be able to reconnect the SBS without first removing the 2008, so make sure everything is working beforehand)
    - force removal of the SBS and metadata cleanup
    - raise functional levels
    LVL 95

    Expert Comment

    by:Lee W, MVP
    You don't HAVE to raise the functional levels anymore unless you want to use certain new features of AD and you SHOULD NOT raise the levels if you think you may ever add a 2003 DC back to the domain (Once you raise them to 2008, you CANNOT lower them... so be CERTAIN!)

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