Voted Best Answer
May 01, 2019 - 11:45 PM
In researching this response I see that there's a new web-based service called Apple Business Manager - I don't have any experience of using that but Apple claim it's an upgrade to the Volume Purchase Program and it looks like it has wide integration support with third-party MDMs. More info here;
Getting back to the actual management of iDevices we didn't do anything - we didn't have an MDM solution. Our policy was that users could use their own or company-issued iDevices, and if they needed a business specific app they could buy it themselves and expense it. All these purchases would have been tied to their own personal Apple ID so if/when they left the company would lose the asset. We had about 500 iDevices and I don't recall much being expensed. One area of slight concern (this was four years ago) was the use of Office apps on iDevices, because we were device-licensed for Office. The view we took was that because we weren't deploying the software or managing their devices we weren't responsible if they used Office with their personal Apple IDs on their personal devices, even if they were accessing company content.
If you intend to manage iDevices and purchase company apps for them then Business Manager would seem to be your starting point - if you want to be able to harvest/reclaim those apps as you would do for on-prem software.