active directory server 2008 32 bit to 2012 r2


Is migrating AD from server 2008 32 bit to 2012 r2, the same as 2008r2 to 2012r2 in terms of ad prep, forest prep etc...?

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hmcnastyAuthor Commented:
This is the file I normally use.
What I would add which is key here is that the schema update required to upgrade to 2012R2 needs to be done on a x64 bit server.

In which case you would need to build the 2012 R2 server, add to domain and then run the adprep from there as it will fail on a 2008 32 bit server.  The doc attached above considers 2008 R2 which is 64 bit so doesn't consider this step (haven't read all of it so apologies if I am repeating it)
Will SzymkowskiSenior Solution ArchitectCommented:
Not it is not. 2008R2 is 64 bit (only). When you are preping your domain you will need to use adprep32 (for 2008 32 bit machine) and 2008R2 you just use ADPrep.


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Lee W, MVPTechnology and Business Process AdvisorCommented:
In 2012 ADPREP is done by the process that promotes into AD anyway.  So yes, it should be the same, there are just a few more schema updates that you shouldn't even notice.

Quoting from :
Considerations for using Adprep.exe in Windows Server 2012 R2 and Windows Server 2012

Beginning with Windows Server 2012, Adprep.exe is integrated into the AD DS installation process and runs automatically as needed. For example, when you install the first domain controller that runs Windows Server 2012 into an existing domain and forest, then adprep /forestprep and adprep /domainprep automatically run and report the results of the operations.

Some organizations may prefer to run Adprep.exe separately, either in advance of an AD DS installation or simply to extend an existing AD DS schema to support new features such as the Device Registration Service in Windows Server 2012 R2. For this reason, Adprep.exe is also included in the \Support\Adprep folder of the operating system disk.

Also beginning with Windows Server 2012, there is only one 64-bit version of Adprep.exe. It can be run remotely from any server that runs a 64-bit version of Windows Server 2008 or later. The computer where you run it can be either domain-joined or in a workgroup. It includes new syntax and parameter options in order to run it remotely.

For more information about the objects and containers that are created when the schema is extended to support Windows Server 2012 R2 and Windows Server 2012, see Changes to Adprep.exe.
hmcnastyAuthor Commented:
Sorry for the delay.  Ok...I was told that 2012 r2 only has a64 bit version of AD prep.  Given that my current AD is on a 2008 32 bit box I would need to update the domain from some 64 bit machine on the network.  Like a windows 7 64 bit machine.  Can anyone confirm this?

hmcnastyAuthor Commented:
Sorry.  I see that Dleaver has mentioned this already.
Just to note my solution was also valid - not contesting the decision though as either would work
Seth SimmonsSr. Systems AdministratorCommented:
This question has been classified as abandoned and is closed as part of the Cleanup Program. See the recommendation for more details.
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