To be able to connect the clients to the DC your DNS setup for the AD domain needs to be setup properly. I'd recommend you create a separate virtual network in the virtual network editor and take a look at Re: Need help with virtual Dev enviroment network that requires a domain controller. where I posted a sample configuration based on a virtual NAT network.
Thanks for your reply. So I see, by adjusting the network adapter to use a static IP and a predefined DNS I was able to connect a Windows XP OS to the Server 2003. But the issue now is how to get the Internet connection to work on that XP machine?
If you followed the description this should work.
Did you configure a new NAT virtual network?
Did you configure the DHCP settings on the DC with the appropriate gateway address?
Did you configure DNS forwarding on the DC's DNS server?
If this does not work as expected, please provide the network details of your current configuration.