I have one of those iphones... (don't hate me too much), and a free app called 'Remote Lite'.
We have a client who has a 2008 Standard x86 Terminal Server and another 2008 Standard 2008 x86 server as a DC. At the moment the users are not part of the domain admins group.
The problems I am having is when I go to connect to the TS externally from the iPhone, there is an error message that comes up saying: The requested session access is denied.
I have done some looking into it, and it looks like it is a TS Gateway issue. I have installed TS Gateway (not knowing what I'm doing really), and this has not fixed the error.
Any help would be greatly appreciated.