We have the Shareplus enterprise license and have tried today to deploy in production on iPads. It is on OTA link with our extranet. The app uses Sharepoint. Within the site, we have the .ipa file, manifest.plist, and the provisioning file.
We have the following settings and observations:
After multiple attempts, the following last resorts work:
Thank you for your support request!
I'm afraid this is rather common in OTA app deployment. If there's a temporary network issue, like low bandwidth, and the app installation takes too long, as per iOS' parameters, it is terminated.
Typically, trying again later solves the issue and lets the app installation go through.
As you state, MDM solutions are optimal for corporate scenarios.
I hope this helps answering your question. Let me know if I can be of further help.