For some type of Mobile Devices, we need to do some preparations before they can be managed like iOS, you need to create and sign an APNs Certificate
- In the Intune administration console, click Admin > Mobile Device Management, and for iOS, click on Enable the iOS platform
- Click on Download the APNs Certificate Request. After downloading the certificate click on Apple Push Certificate Portal.
- Click on Create a Certificate, Check I have read and agree to these terms and conditions and click Accept.
- Click Browse, select downloaded certificate and click Upload.
- Click on Download to download the signed APNs Certificate.
- Click on Upload the APNs Certificate.
- Browse to the download signed APNs certificate and click Upload.
- Now you’re ready to manage iOS devices