I have the same problem. My PAP expires Dec 2 and I do not arrive until Dec 8. The
MDE site keeps telling me that I need a ticket linked in order to choose my FP+ selections for my Dec 8 trip. I have a prepaid renewal pass but I am afraid that if I try to link it now, it will activate the new PAP now. When I spoke to MS last week they could not guarentee that my PAP renewal would not activate upon linking it. Can anyone let me know if it activates day of linking or day of first use. Thanks.