The account that was used to generate the token still exists in your Apple Business / School Manager instance?  ... View more

1. Is your push notification certificate valid? 2. Are you using the correct credentials ? 3. So you have enough SM licenses available?  4. Try factory resetting the device and trying again.  ... View more

Looking at the Apple docs, there's no specific restriction that prevents App Store access on Messages: https://support.apple.com/en-gb/guide/mdm/mdm0f7dd3d8/web I'd suggest this is likely a feature request /issue that Apple will need to resolve, you can open a support ticket directly with Apple if you wish: https://support.apple.com/en-gb/contact ... View more

Well by george it worked!! ... View more