Can you make a Server 2008 machine a Domain Controller in an existing SBS 2003 domain? We have a Server 2008 machine (disjoined from domain). The existing domain is a SBS 2003 one. The DC is running SBS 2003 SP2. I want to know if I can promote the Server 2008 machine in the existing SBS domain? This 2008 server is currently installed on a VMware platform on a physical serevr that will be shipped to one of the remote offices. the existing SBS 2003 DC will be upgraded (at some point) to Server 2008.