Data flow: Receiving configuration updates on an 

iOS

 device

An action is taken in the management console that triggers a configuration update for an 

iOS

 device. For example, you update the IT policy or assign a new profile or app to the user account. 

Updates are applied in 

BlackBerry UEM

 and objects that must be shared with the device are identified.

The 

BlackBerry UEM Core

 performs the following actions:

Contacts the 
BlackBerry Infrastructure
, through the 
BlackBerry Router
 or TCP proxy server, if installed, and the external firewall over port 3101.
Sends a request through the 
BlackBerry Infrastructure
 to the APNs to notify the device that an update is pending.

The APNs sends a notification to the native MDM Daemon on the 

iOS

 device to contact the 

BlackBerry UEM Core

. 

When the native MDM Daemon on the 

iOS

 device receives the notification, it contacts the 

BlackBerry UEM Core

, on port 3101 on the external firewall, passing through the 

BlackBerry Router

 or TCP proxy server, if installed, to retrieve any pending actions.

The 

BlackBerry UEM Core

 replies with the highest priority action. Priority is given to device actions, such as Delete device data and Lock device. The 

BlackBerry UEM Core

 sends only one command at a time. If necessary, additional information is included in the response. If no actions or commands are pending for the device, the 

BlackBerry UEM Core

 replies to the device with an idle command.

The native MDM Daemon on the 

iOS

 device performs the following actions:

Inspects the response from the 
BlackBerry UEM Core
, schedules the command to be processed, and waits for the command to run.
Sends a response to the 
BlackBerry UEM Core
 to update the command status. The status indicates whether the command ran successfully and provides an error message in the event of a failure.