Hello,
I'm trying to connect from a workstation in China running Windows 7 with all the updates to a 2012 server in Arizona that has all the latest updates. The RD client is 6.2.9200.
They are trying to connect at 1024 by 16 bit color, no sound redirect, only clipboard for local resources, experience set for 56kbps, reconnect if connection is dropped.
They attempt to login and during the welcome screen with remote it will say
Your remote desktop services session has ended.
The connection to the remote computer was lost, possibly due to network connectivity problems. Try connecting to the remote computer again. If the problem continues, contact your network administrator or technical support.
If that same computer attempts to connect to a number of 2008 R2 servers in Arizona on the same network switch - they can connect without issue. This only occurs connecting to 2012 servers. I can log in as that same user from another workstation anywhere in the US and RD works fine. I've tried from an XP machine with the latest RD client, a Windows 7 PC and Windows 2008 R2 all running the latest client and they all have the same issue from our China office but only to 2012 RD servers, not to 2008 RD servers on the same subnet.
I can remote to it from other places within the US, but it seems very sensitive and only works 20% of the time when connecting from computers in China - sometimes they work the next day the same computer may not. We have about a 2mbit throughput between locations when copying files. The latency is high but it is in China so I'm not expecting instantaneous connectivity. Our connection to the US is as optimized by China Telecom as we can get for routing.