When you move all device from Airwatch MDM to Intune MDM platform. Please make sure the iOS devices must be wiped before enrolling in Intune. Please check the Special migration considerations for more details.
In addition, Intune provides a detailed migration guide for migrating to Intune from other MDM solutions. You can learn more about this guide by clicking the following link.
https://learn.microsoft.com/en-us/intune/fundamentals/migration-guide
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