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The simplest way of associating a VPP account with your user's devices is using an Enrollment an Enrollment Configuration. Correctly configured this will automate the linking process fully, and devices will be able to get licensed Apps from one of the VPP accounts already linked to CapaInstaller and/or give the user the option to choose one during enrollment. As part of the device enrollment, an invitation to the VPP will be sent to the device, and a VPP User will be created in your VPP Account with the status 'Registered'. Once the user accepts the invitation, the VPP User in System Administration will change the status to 'Associated', and will be linked to the Apple ID of the user who accepted the invitation on the device.
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