We recently upgraded one of our customer's network (WAN) to Fiber and installed new routers in several sites. The customer is migrating from an iVPN scenario where multiple sites establish IPSec tunnels to a central router (in the company's HQ) to a scenario where the Central router is nor required for all sites to communicate with each other. All IP addressing was maintained. What the client is noticing is that in some sites the computers cannot initiate the remote desktop session when using the new fiber line and router (the login process happens, it tries to connect then returns an error) yet we can Telnet to the remote TS server over port 3389 without any problems... when we switch back to the old ADSL line and router (computer maintains the IP Address) the computer can establish the Remote Desktop session without any problems.
Our Client's IT support is struggling with this problem and hasn't found a solution yet. It doesn't seem to be a connectivity issue as there are 3 sites that are working perfectly with the new fiber line and router. Could it be a licensing problem? Cloud there be some kind of binding that isn't released when the computer switches to the new fiber line and router (yet maintaining the same IP address)? I've read about NAP in TS Server, could it be something along those lines? The IT tech mentioned an Error 21 in the Server's Event Log...
The Licencing type is "Device", and according to the IT Tech there are licenses available.
Any ideas as to what might be behind this strange behaviour? I apologize if there are some important details or information that might be missing, but this isn't a product that I'm totally familiar with :-( I'm trying to help are customer in getting things up and running.
I thank you in advance for your attention into this matter.
José Carlos
