We have 1 domain controller running Server 2003 and I would like to add a second one running Server 2003 R2 version. Have seen conflicting information about running ADPrep on the original domain controller. One resolution says to run ADPrep (from the R2 CD) on the original domain controller (non-R2) to apply the R2 Schema extensions. Can anyone verify for me that this process works and will not crash AD or the Schema?
The error that I received when trying to run DCPromo on the R2 server was, " The Active Directory Installation Wizard cannot continue because the forest is not prepared for installing Windows Server 2003. Use the Adprep command-line tool to prepare both the forest and the domain.