This Apple ID can't be used to make purchases - InTune/Apple Business Manager
Solution:
- Purchase licenses through the Apple Business Portal and assign them to your site.
- Create a VPP Token in the business portal and upload it to InTune.
- Sync the token to see your Apps in InTune, when allocating them in InTune you need to click on the Volume Purchased iOS version of the app, assign to a group of the users, but make sure that the license is allocated as Device based.