Merge pull request #291277 from kgremban/dec2-deviceconnect

ModuleId in connection state events

Author: prmerger-automator[bot]

articles/iot-hub/iot-hub-non-telemetry-event-schema.md

@@ -73,6 +73,8 @@ Connection state events are emitted whenever a device or module connects or disc
 | iothub-message-schema | deviceConnectionStateNotification |
 | opType | deviceConnected or deviceDisconnected |
 
+Both modules and devices use the `deviceConnected` and `deviceDisconnected` application properties to report connection state events. If the event came from a module, then the event also includes a `moduleId` property. If there is no `moduleId` property, then the event came from a device.
+
 **System properties**: The following table shows how system properties are set for connection state events:
 
 | Property | Value |