if you mean in chapter4 when you get to alfheimr, you first talk to borge who gives you a mission to get permission to be in alfheimr, then you talk to all the other captains (and dont press on anything else since you are not allowed to use it before finishing borge's mission). completing jorgen's, jostein's, tyr's, and henrik's missions will lower the raid upkeep, so finish them fast.
or did you mean something else?