I have a similar problem.
SBS2003R2 behind a Sonicwall firewall.
I can connect via RWW and can use OWA, I can view server logs but I cannot connect to servers (2) or workstations. When I attempt a connection I get a popup warning me that another computer wants to start a remote desktop connection and that the publisher cannot be verified, I click connect and then get an error message stating that the client could not connect to the remote computer.... etc.
I've read everything I can find regarding this problem but nothing seems to work. I've checked that the firewall is forwarding https requests to the server. Netstat does not show anything using port 4125 and I can connect internally via localhost/remote.
What should I now be looking for to track this down?
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