

There's a problem with the certificate that lets the mobile device communicate with your company's network.
CAN T CONNECT TO APPLE SERVER ON IPHONE HOW TO
Review the information about how to set up users in Sync Active Directory and add users to Intune and organizing users and devices.

Check that enrollment has been set up correctly and that iOS/iPadOS as a platform is enabled. The Apple Push Notification Service (APNs) certificate is missing, invalid, or expired. The following table lists errors that end users might see while enrolling iOS/iPadOS devices in Intune. See Troubleshoot device enrollment in Microsoft Intune for additional, general troubleshooting scenarios. This article helps Intune administrators understand and troubleshoot problems when enrolling iOS/iPadOS devices in Intune.
