At the moment, PDF Expert 6 can be distributed via Apple's Volume Purchase Program — according to App Store's policy, only the full app can be obtained via the program and no in-apps are included. Thus, in case of volume purchase via VPP, our Pro in-app should be obtained individually for each device.
If you're looking for a corporate solution for extensive account management, you can take a look at our B2B service called Fluix. It was created specifically to address the needs of our enterprise customers and to initiate paperless processes, in the filed and globally.
In addition to regular PDF Expert's functionality, Fluix provides document routing and much more.