We have a Windows 2003 (X86) based domain and I'm trying to promote a 2008 R2 (X64) server to become a Domain Controller with the view of retiring the 2003 unit. When I run Adprep /forestprep (from the 2003 DC) from the Windows 2008 DVD I get the following error:
The image file Z:\SUPPORT\ADPREP\ADPREP.EXE is valid, but is for a machine type
other than the current machine. Now I appreciate that we have an X86 and X64 differerence here, what I'm not sure of is the order in which I need to do this. Do I need a Server 2003 (X86) CD, or 2003 (X64) CD so I can prep the domain for the inclusion of the new 2008 R2 server? A step by step guide would be appreciated guys!