Must the school have two IEP meetings for each parent if they are divorced?

No. The school is obligated to make reasonable efforts to involve both parents if they have joint custody, but it is not obligated to have two meetings. If one parent has custody for educational purposes, the school would not be obligated to consider the other parents schedule at all. Unless the custody decree limits a non-custodial parent’s right, they have a right to attend, if they are able to, at the time scheduled with the custodial parent. Again, unless limited by the custody agreement or order, they would have the right to access the information, including the IEP or any report of the meeting even if they don’t attend.