Upgrade Active Directory from 32 bit to 64 bit.

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

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

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.

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. :-)

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.