I created an iOS app and want to distribute it Over-The-Air. I followed this guide:
http://help.apple.com/iosdeployment-apps/mac/1.1/?lang=en-us#app43ad77ea
Another Issue that it could be is that both the .plist AND the .ipa need to be hosted with HTTPS and not just regular HTTP. The software package string should look like below:
kind software-package url https://example.com/app.ipa
Stupid little oversight but it was tripping me up for awhile.