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Adding 2008 server to 2003 domain forest and promoting 2008 to master domain controller.

Hello and thank you for your time and input. Your expertise is always much appreciated and valued.

We have 2003 Enterprise ed. SP2 server. Currently its the main domain controller.
We just purchased a new 2008 std server.
I need to know how to add the 2008 to existing 2003 domain, and later promote demote 2003 as master and promote 2008 to main dc.
To add to the complexity of things. All users have roaming profiles. So their profiles need to be migrated as well.

I know i need to run DC promo on the 2008 box to add to domain.
Do i need to run DC Prep on the 2003 box?
What about the profiles?

What is the process for this.

I know this is a lot...
Many thanks in advance...

Watch Question

Top Expert 2013
You do need to prep the forest/domain.   Are you going with 2008 or 2008 R2.   I'd go with 2008 R2 at this point.  Let us know what version.  

You add the Windows 2008 box to the domain like any other box and then dcpromo when ready.

See this question I helped with for more details...don't feel like typing it all again :)





Hello thank you for prompt response.

The new server is 2008 R2.

Thank you..
Hi first your senerio does not need any migration tool like admt or so on.
1.First run adprep /domainprep then adprep /forestprep on 2003 machine  this will increase the schema version and make 2008 compatible with 2003 domain
2. Run dcpromo on 2008 r2 machine and dont raise the forest functional level 2008 let it be 2003
3.Then let all the repllication happen gradually with 2003 and 2008 r2 server
4 Now using Ntdsutil transfer all the roles to 2008 server
5.If there is a roaming profile on 2003 server you have to change the path through the registry and GPO .
6.Now you can decommision the 2003 server without any major concern.
Please let me know if there is any confussion.
Technical Lead
Top Expert 2011
There are a couple of very important considerations, that you should have in mind, before you proceed with your migration scenario.
--Check, and raise, if necessary, the Domain and Forest functional levels. You cannot upgrade directly from Windows 2000 mixed, or Windows Server 2003 interim domain functional levels.

--The first Windows Server 2008 Domain Controller in the forest must be a Global Catalog Server, and it cannot be a Read Only Domain Controller, RODC.

--Check the FSMO roles assignments. When you prepare the existing AD, you should run adprep /forestprep on the Schema operations master, and adprep /domainprep /gpprep on the infrastructure master.In your case as there is a single Dc you need to run on the same server.

Steps to Install Windows 2008 R2 DC

1.First prepare the domain.
Insert Win 2008 R2 DVD on windows 2003 DC and execute adprep as below
Ran D:\2008DVD\Support\Adprep\adprep32.exe /forestprep on the server holding the Schema Master role.
Ran D:\2008DVD\Support\Adprep\adprep32.exe /domainprep /gpprep on the server holding the domain master role.

Reference article:http://www.petri.co.il/prepare-for-server-2008-r2-domain-controller.htm

2.Install DNS role in win2k8
Reference KB article:http://technet.microsoft.com/en-us/library/cc725925.aspx

3.Once DNS role is installed.Ran dcpromo on win2k8 R2.
Reference KB article:http://technet.microsoft.com/en-us/library/cc753720(WS.10).aspx

4.After the Win2k8 Dc promotion is completed restart the win2k8 DC.

5.You must transfer the FSMO roles to the 2008 machine then the process is as outlined at http://www.petri.co.il/transferring_fsmo_roles.htm

6.Ran dcdiag /q and repadmin /replsum on DC to check for any errors.

7.Change all of the clients (and the new 2008 DC itself), to point to the 2008 DC for their preferred DNS server this may be in DHCP options or the TCP/IP settings.


Thank you this worked great..

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