Originally Posted by
emcampbe
AFAIK, you can now select/change seats from external bookings - at least some of them. I just had one booked through RBC points, I think it books through Carlson Wagonlit, and I could change seats - just has to go through a separate site then the typical manage my booking - there's even instructions/a link on the main manage my bookings page, but it does require entering in the PNR/last name twice.
I could see my reservation (made by UA)on the Air Canada site using the AC confirmation code, but it would not allow me to select Business seats.
Called their customer service & was able to get the desired seats.