Trying to distribute an Ad Hoc application for a handful of users for testing. I have created the Ad Hoc provisioning profile and the test devices are visible in 'Devices' (UDIDs added) in developer.apple.com/account
Every time I create a new archive and distribute to the devices I get "Unable To Install [app name] This app cannot be installed because its integrity could not be verified".
The bundle IDs match perfectly.
After 4 hours of getting nowhere I now reaching out for help.