Hi Jorge,

I wanted to check if you are referring to Device Check-in (MDM Client) for individual device. Since there can be a update schedule for Apple devices which can be found under 

Group details>Configurations>Apple update Schedule

screenshot included for reference

You can change update Schedule as per your requirements. This schedule request for Device Check-in. Please let me know of you have any other question. Thank you

Good Morning.

Thanks for your answer.

The problem is solved. My APNs certificate was expired.

Thanks you