Hi Lena,
Just to keep @Denis Eigster post here up-to-date: We're now in the beta-program of the LeanIX-Apption integration and are already testing our configured and running data transfer from LeanIX to Apptio. It seems to work quite smoothly as one would expect this to work.
Much better than the old export-import integration we did years ago and Denis described above.
Regards, Andreas