You’ve no doubt read my post on why Apple products (Macs/iPhones/iPads) are unable to connect to Windows computers that are behind a Windows Server. I’m sure I’ve disappointed ones-upon-ones of people with that post, but suffer no more!
Yesterday, I found an app that recently added the missing feature called RDP Gateway. It’s called iTap, and it works really well!
You can read more about it here: http://itunes.apple.com/us/app/itap-mobile-rdp-remote-desktop/id317062064