The 90 days range is risky for us since as sabatical or maternity leave can sometimes take up to 200 days or even more. Since we forbid the user to remove the app and profile there is no way to bring the device back online if the device entry was removed from DNSFilter. So the device has to be restored to factory default to bring it back online.
So it would be great if there would be more options that go up to 1 year.