Hi. I have an AE trip scheduled for the 28th on UA and AC in J. Flight is AMS-IAH-YYZ with 3 hrs connection time in IAH. Will UA tag my checked bags all the way to YYZ from AMS or will I need to retrieve them at IAH and check in again? Does UA issue onward boarding passes for AC? What are the lounge options in IAH for the AC flight? Any info would be helpful. Thanks in advance.