Hello.
Sorry for my poor English.
I have strange issue with TS Gateway. We have TS Gateway on Windows 2008 r2 SP1 Standard. Max connection - 250. But when connections goes to 87 or near I see Event ID 203 in TS Gateway log. And new users couldn't connect to server. No UAG or TMG between server and client. What it can be? How TS Gateway count connections? It's like it doesn't show some connections in console, because via netstat I see much more connections to System process via 443 port.