I 'bought' some licenses of a free app via VPP. I made sure the app is 'device-assignable'. I added the app to the Mobile Device Apps, I have set it to 'Install automatically'. But in the VPP pane it always tells me "Content not available to assign to mobile devices".
I have made sure there is no user assignment for this app, 'Site' is set to 'None', so what else might make this content unavailable for device assignment?
I also tried to assign it to a device in scope, but the result is that the user is asked to sign in to iTunes for the installation - this is exactly what I want to avoid.
Any hints are welcome.