@testuser7, Thanks for posting in Q&A. In General, Intune uses the Apple Push Notification service to communicate securely to your enrolled iOS devices, and Apple requires that each MDM service utilize their own certificate to establish a secure mechanism for devices to use when communicating on Apple’s push notification messaging network.
Your understanding is correct. When an Intune policy is created or modified, the relevant information is sent to APNs, which then pushes it to the device. Unlike Android, there isn’t a specific “Intune Device Policy” app on iOS, the enforcement of policies happens directly within the managed apps themselves.
Hope the above information can help.
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