This data flow describes how work email and calendar data travels between iOS devices and the Exchange ActiveSync server using the BlackBerry Secure Gateway.

1. The native email client on iOS maintains a permanent connection with the email server over an encrypted and authenticated channel between the BlackBerry Infrastructure and the BlackBerry Secure Gateway and detects changes in the folders configured for synchronization on the mail server.
2. When there are new or changed items for the device, such as a new email message or updated calendar entry, the mail server sends the updates to the device through the secure channel between the BlackBerry Secure Gateway and the BlackBerry Infrastructure to the email or organizer app on the device using the Exchange ActiveSync protocol.