Environment: 2 Windows Server 2008 non R2 domain controllers. Domain Functional Level is at 2003. The old 2003 Domain Controller is gone, but I need can't raise the domain functional level just yet.
Problem: I'm adding trying to add a new Server 2008 R2 Domain Controller. When doing DCpromo I get promoted to run "adprep /forestprep". After doing some research on this I know i have to do this on the schema master. Some posts say to remove the 2003 server but it no longer exists. I just want make sure I have everything in check before i run this on production servers. Also will this cause any changes?