My 60 day mark is tonight! I am set and ready for fastpass…I think:). My in-laws check in the day after us. Their reservation is linked to mine on my disney experience. When I make fastpass reservations will I be able to make them all starting tonight or will I have to wait till tomorrow for all of us? Thanks!!
Very good question! I wish I knew the answer. I hope someone with experience will see this. 
You can make yours tonight, but you’ll have to wait 24hrs to make theirs.
Bummer! I am aiming on getting Anna and Elsa for the group of us. I was planning on a one day head start:).