Originally Posted by
SeeBuyFly
If you will read my reply, you will realize that I already said that she needs to make sure CX knows the two are connected. Today that has to happen via BA, since they issued the ticket. If that doesn't work, it has to be done at checkin by telling the the CX agent about both reservations---not OLCI. The OP said s/he might avoid checking in for the 2nd flight when checking in for the first, and in that case CX will not know,
Both BA and CX use Amadeus, so if BA links the reservation (makes a note in the PNR), CX can see it as well.