What should a Citrix Engineer configure in order to ensure Apple Push Notification service (APNs) works with outbound proxy communications?
A. Enable outbound proxy communication for APNs communication through the XenMobile Web console.
B. Enable outbound proxy communication for APNs communication through the XenMobile Server command-line interface.
C. Enable then deploy the XenMobile proxy policy to user devices.
D. Enable outbound XenMobile proxy communication on the NetScaler.