Distribute Custom B2B iOS app through Apple Volume Purchase Program?

Our requirement is to distribute iOS app for more than 1000+ users within the Organization.

My question : Can we make Distribution iPA using iOS Developer Provisioning Profile (As We have $99 Apple Account Not Enterprise Account) and share it with VPP and Apple MDM (Memory Device Management) or should i opt for Enterprise Apple account ?

**Note1 - Dont want to use Adhoc Provisioning Profile as it require all devices registered in apple account and we have 1000+ Apple Devices.

**Note2 - Already gone through other related post but dint find the steps to disbtribute the iOS using VPP , all post suggest to use Enterprise Distribution (Our requirement is to use VPP since Our business customer have already have VPP )

**Note3 - We have developed an iOS app , not want to share purchased app through VPP . Kindly Suggest any reference which guides me to deploy App through VPP.

Solution

If the one organisation is both the developer and the consumer of the app, then an enterprise program membership is a possible approach. With an enterprise membership you can:

Develop apps
Sign those apps for private distribution
Distribute those apps, without going through the Apple approval process
Distribute those apps via a private app store/intranet/MDM system etc.

If you want to provide apps to one or more enterprise customers that are independent of the developer then an individual membership and B2B distribution is the correct approach. The steps are outlined here but in summary:

You develop your app as you normally would
You create an entry for that app in iTunes connect, specifying Available privately as a custom B2B app in the Pricing and availability section
You can also specify the price tier that applies to this app. You can select the free tier and arrange payment directly with the customer if you prefer.
Nominate an AppleID associated with the VPP customer you are going to supply to
Submit the app for Apple approval as per usual

2019 addendum

It is now possible for an organisation to provide B2B apps to themselves. The advantage of B2B apps is that they never expire and don't require periodic provisioning profile validation and refresh. The disadvantage is that there is still a review process, so if you are doing things that won't pass review you can have an issue. The review process also introduces some release delay.