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Upgrade Active Directory from 32 bit to 64 bit.

Posted on 2007-11-21
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Last Modified: 2008-05-31
I am trying to upgrade my Active Directory from a 32 bit system to a 64 bit system and what I am looking for is step by step document or help on the best way to accomplish this task.

Thanks,

GabicusC
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Question by:Richard Comito
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8 Comments
 
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by:Toni Uranjek
Toni Uranjek earned 600 total points
ID: 20330294
Hi GabicusC,

You can not perform inplace upgrade from 32-bit OS to 64-bit OS. You would have to setup up second domain controller on 64-bit OS and the transfer GC role and FSMO roles to new server if you are thinking of decommissioning old DC.

HTH

Toni
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Author Comment

by:Richard Comito
ID: 20330412
Toni,

Thanks for the reply.  I have a 64 bit server already to go I am having an issue preparing the 32 bit Active Directory to go into my 64 bit server.  The tool that I have to prepare this is on the 64 bit server and I am not able to access the 32 bit server.

GabicusC
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Expert Comment

by:tigermatt
ID: 20330425
I agree with toniur. Basically, Active Directory itself is not 32- or 64-bit, in fact you can have both 32- and 64-bit DCs in your domain without a problem. What is 64-bit is the server OS and processor which you install; obviously there are many advantages to using a 64-bit OS, but both 32 and 64 bit DCs and member servers can co-exist in the same domain without problems, just dcpromo them as usual and AD info will come across from your existing DC(s).

-tigermatt
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LVL 31

Expert Comment

by:Toni Uranjek
ID: 20330507
Which tool are we talking about? ADprep? Do you have 64-bit OS Server R2? You should find 32-bit adprep and run it on your first DC if this is your problem.
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by:MidnightOne
ID: 20330595
We have one client using a Windows NT Server as a PDC, Windows 2003 32-bit and a Windows 2003 x64 domain controllers.

Yes, they all work together. :-)
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by:rjwesley
rjwesley earned 600 total points
ID: 20330982
Transferring roles - you'll find these helpful

http://support.microsoft.com/kb/324801
http://www.petri.co.il/transferring_fsmo_roles.htm

If your thinking Exchange 2007 (NT server must be properly removed from active directory).

Rob


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Expert Comment

by:LauraEHunterMVP
ID: 20331489
Before adding a 64-bit domain controller into an Active Directory that already contains a 32-bit DC, you'll need to run the 64-bit version of adprep /forestprep and adprep /domainprep from the 64-bit media.  Once this is done, you can add a 64-bit DC as an additional DC in an existing domain as normal.
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Jay_Jay70 earned 800 total points
ID: 20332097
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