I have a Windows Server 2003 R2 DC running a private forest. I have added a Windows Server 2008 machine to the domain and want to promote it as a DC in the existing forest. How To Play .rmvb File Extension.

I added the Active Directory Domain Services role to the server, and rebooted. It asks me to run 'Active Directory Domain Services Installation Wizard (dcpromo.exe)'. As I step through this wizard, I get an error: --------------------------- Active Directory Domain Services Installation Wizard --------------------------- 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 installation media in the sources adprep folder.

--------------------------- OK --------------------------- So I go to the media and run this command: -------------- BEGIN -------------- Z: sources adprep>adprep /forestprep Adprep cannot run on this platform because it is not an Active Directory Domain Controller. [Status/Consequence] Adprep stopped without making any changes. [User Action] Run Adprep on a Active Directory Domain Controller. -------------- END -------------- Oops, looks like I was supposed to run this on the currently active DC. So I go over to the Server 2003 R2 DC and run adprep from it's media and it seemingly succeeds: -------------- BEGIN -------------- Z: CMPNENTS R2 ADPREP>adprep /forestprep ADPREP WARNING: Before running adprep, all Windows 2000 domain controllers in the forest should be upgraded to Windows 2000 Service Pack 1 (SP1) with QFE 265089, or to Windows 2000 SP2 (or later). QFE 265089 (included in Windows 2000 SP2 and later) is required to prevent potential domain controller corruption.