Can someone clarify how this checkbox affects the logic in the turn resolution? In this game, http://www.wargear.net/games/player/42024, and this game, http://www.wargear.net/games/view/41918, no one is able to select the "team" checkbox when giving orders, and I'm not sure why. Ideally, using that checkbox would allow players to prevent friendly fire incidents by using a transfer instead of attack order to territories owned by a teammate. However, I'm not sure that is working correctly. Anyone know what the story is?

You have Team Unit Transfer turned off in the rules.

Whoops!... well, ah, just move along folks, nothing to see here....