Merge pull request #234314 from PatAltimore/patricka-nested-az

Update nested edge tutorial to use az command

Author: denrea

articles/iot-edge/how-to-connect-downstream-iot-edge-device.md

@@ -1,6 +1,6 @@
 ---
 title: How to create nested Azure IoT Edge device hierarchies
-description: Step by step adaptable manual instructions on how to create a hierarchy of IoT Edge devices. 
+description: How to create a trusted connection between an IoT Edge gateway and a downstream IoT Edge device.
 author: PatAltimore
 
 ms.author: patricka
@@ -11,11 +11,11 @@ services: iot-edge
 ms.custom:  [amqp, mqtt]
 ---
 
-# Connect Azure IoT Edge devices together to create a hierarchy (nested edge)
+# Connect Azure IoT Edge devices to create a hierarchy
 
 [!INCLUDE [iot-edge-version-1.4](includes/iot-edge-version-1.4.md)]
 
-This article provides instructions for establishing a trusted connection between an IoT Edge gateway and a downstream IoT Edge device. This setup is also known as "nested edge".
+This article provides steps for establishing a trusted connection between an IoT Edge gateway and a downstream IoT Edge device. This configuration is also known as *nested edge*.
 
 In a gateway scenario, an IoT Edge device can be both a gateway and a downstream device. Multiple IoT Edge gateways can be layered to create a hierarchy of devices. The downstream (child) devices can authenticate and send or receive messages through their gateway (parent) device.