I may just be unobservant, but I've looked all over for the answers to some questions and have found no or contradictory information.
If me and a friend join different grand companies, how screwed are we in terms of doing things cooperatively? I see things like Quest Name (Ul'dah) and Quest Name (Gridania). Can someone with (Ul'Dah) do those with a Gridanian with their version of the quest? If so, are those the only quests you can cooperate on and both get credit?