I'm attempting to try to do some testing using a virtual domain I created called testrealm.com. I have one DC running Windows Server 2003 R2 and a Client computer running Windows Vista Business. Both of these machines are Virtual PC's using Microsoft Virtual PC 2007. I am having issues connecting the client to the testrealm.com domain, it keeps saying that it cannot see the DC for testrealm.com. I have tried auto IP's and fixed IPs, I've tried using local only and NAT, DNS and AD are both installed and I added a user account and computer account to AD on the DC. The DC is also running SQL 2005 SP2 and SCCM 2007 (which is the program I'm trying to play with so I can get involved in DDPS). Any ideas?