I am introducing a 2008 R2 server into a 2008 SP2 domain. When I attempt to install Active Directory Services on server being introduced, a message to run adprep.exe /forestprep prior to installing the services is received. I
have executed the adprep32.exe /forestprep at the command prompt on the existing 2008 SP2 domain controller. The command appears to execute with no error message and returns to the command prompt. I return to the 2008 R2 server to add the Active Directory
Services role but still get the same message that adprep.exe must be run. I am using the adprep32.exe located on the 2008 R2 media and the command was executed on the one existing domain controller. What am I doing wrong to prevent the
introduction of the new domain controller?
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