I am having a very strange issue where my users lose connection to our terminal server and then we have to run the command "ipconfig /flushdns" once we do that it seems to fix it momentarily. The issue is seemingly random and when it is occurring I can run "nslookup servername" and the server always resolves. I can also always ping the servername IP address when this occurs.
This is running on a Server 2008 R2 virtualized server.
DNS event viewer is relatively clean, a few errors every few months but nothing that draws my attention.
One note: We have several satellite offices that all VPN to a central office. That is where our servers are located. They are all on separate network subnets. The DHCP DNS is set the same at each location. I don't think this is a network issue, since I can always ping the servername and resolve the name with nslookup.