AppStore 'Get' does nothing when clicked

Question

Hi. I had a policy where the restrictions for the App Store were allowed and users could download an App. Now when I click it, it seems to do nothing. I have ticked the boxes to "Allow app installation" and also "Allow app installation from device UI" but it still does not allow it. If I remove the policy then clicking 'get' brings up the "Sign in to complete purchase" but I do not want to give out the AppleID. 
 Is there something I am missing that is restricted? Or is there a way I can push out the AppleID remotely to all my ipads so that it will auto sign in to the App Store? 
 Thanks

Qoosh · Answer

Hi Ric , 
 Thanks for reaching out to the Sophos Community Forum. 
 If the devices were enrolled using DEP/Apple Business manager, you will need to use VPP to assign applications to devices. You can find steps on how to do this in the following link. - Manage Apple Business Manager apps 
 If you wish to assign applications/licenses based on the user and not per device, you can Invite users to Apple VPP .