I am trying to install a new Windows 2008 R2 Domain Controller into an existing Windows 2008 domain. When I run dcpromo on the R2 server, I get the following message:
"To install a domain controller into this Active Directory forest, you must first prepare the forest using "adprep /forestprep". The Adprep utility is available on the Windows Server 2008 R2 installation media in the \support\adprep folder.
The old domain controllers are running the 32-bit version of Windows Server 2008. When I run adprep on them, I get the following:
Forest-wide information has already been updated.
Adprep did not attempt to re-run this operation.
Any assistance is greatly appreciated.