I would like to force .mp4 files for a particular group of users to open in Quicktime rather than iTunes. Is there a way to make this happen in Open Directory? I have yet to delve into OD profiles, but if that is the answer, if someone can point me in the right direction I'd be grateful. Within the Server app or Workgroup Manager I don't see any place to affect this change. We are running Lion Server (10.7.5).