I have a client that has two machines that when I try to have them join the domain, I get an error that says there was no Domain Controller available within the domain name. Host does not support Dynamic DNS. I’ve never seen this error before. The DC is running DHCP and all the other client workstations are joined to the domain. I’ve had very little exposure to SBS and BackOffice, so I’m not sure if this is specific to this software. Can someone point me in the right direction to learn more about the problem and how to fix it?