Continuous 'Sign in to iTunes' pop-up on iPhone with ABM and Intune integration

We have enabled the integration between ABM & Microsoft Intune, Added devices to ABM and it got synced to Intune as well. We have aded VPP and added few applications and they were synced to Intune and we have pushed them to Mobile devices but on the devices it is continously asking pop-up "Sign in to iTunes to allow your organization to manage and install apps"

[Re-Titled by Moderator]

Original Title: continuously getting pop-up "Sign in to iTunes to allow your organization to manage and install apps" on iPhone Devices