I was investigating some aspects of Microsoft Active Directory. In order to do this I created a new forest and then I needed to create a child domain of the forest on a different server. When ever I tried to create the child domain I received the following error:
The wizard cannot gain access to the list of domains in the Forest. This condition may be caused by a DNS lookup problem. The error is: The RPC server is unavailable.
I googled this error and got no satisfaction. I tried just about everything to no effect. As a matter of course I usually turn off “client for Microsoft networks, File and printer sharing and netbios on the network adapter. I dont need these services and since these are VM’s I try to turn off as much as possible for performance and security reasons.
As soon asI enabled "Client for microsoft Networks" I was able to create a child domain. Solution: network addapter->client for microsoft networks -> enable
There may be other causes for this. Certainly you need your DNS in order. But this was my solution to the problem.