How do I use the check in on connection feature of the app? Has anybody succeeded using this? When I press the link, I am asked for a PNR, and then I invariably get a message that the departing time does not allow it.

Because of that, I was checking in separately for connecting flights, on separate PNRs, so far. Yet on tight connections it would be nice to link the PNRs so that the second flight staff know it. I was hoping that this app feature is for this. And possibly for cross checking luggage more easily.

(my connection time in CPH is 55 minutes tomorrow, Schengen-to-Schengen, so I don't think this is an MCT problem).