Originally Posted by
flytoeat
I frequently change itineraries online with guest upgrades applied. Then I email MP and get them reinstated. I suppose if you don't have additional gold upgrades to apply in the interim, you might not be able to secure the new upgrades. But you can absolutely revise upgraded itineraries online.
I can assure you that if I click "change" it says "this itinerary cannot be changed online" So it is not an absolute.