So, did you manage to "tackle" the people problem in the end? How did you get them to move and integrate with your system in the end? Was it a bottom up (from the end users) or top down (making it part if company strategy) approach?
Sadly, I don't have these answers. I ended up quitting to go on a long sabbatical.
Last I heard, the airline scrapped the entire project to continue doing things the old way because they felt it was too much work on their end. ¯\_(ツ)_/¯
