Originally Posted by margarita girl

Yes, it can be done, sort of. What needs to happen is that she needs a new PNR for the return. This can be done by calling AC. Problem is you cannot split the booking into 2 PNRs until the outboound has been flown, so depending on how long her trip is, you may not be able to request the upgrade at the 7 day window.

This just happened to a friend. He is E and was planning to upgrade his outbound, but got an SE to upgrade his return before his E window opened up. He was no longer able to upgrade his outbound.

So had to call AC and cancel the return upgrade. He was then able to upgrade his outbound, and once that flight is completed, he will call AC for a new PNR so the SE can upgrade his return.