This excellent article Dealing with Poor Bandwidth and Latency is an excellent article how Terminal Servers or Remote Desktop Servers should take into account poor bandwidth and latency for Remote Desktop Services. The factors highlighted in the articles include
- Changing packet acknowledgements timer
- The use of QoS
- MTU and more…..
But that is just the Server side. You must also configure the Client portion to deal with High Latency Issue. You should try to update to RDP Client and make use of the new features. Among the many features is those that support High Latency Network
There are many ways to reduce the latency between the client and server. Will probably write on this soon.