Merge pull request #219983 from timlt/cli-telemetry

update for powershell command

Author: prmerger-automator[bot]

articles/iot-hub/quickstart-send-telemetry-cli.md

@@ -176,11 +176,17 @@ In this section, you update the state of the simulated device by setting propert
 
 1. In the second CLI session, run the [az iot hub device-twin update](/cli/azure/iot/hub/device-twin#az-iot-hub-device-twin-update) command. This command updates the properties to the desired state on the IoT hub device twin that corresponds to your simulated device. In this case, the command sets example temperature condition properties.
 
+    > [!IMPORTANT]
+    > If you're using PowerShell in the CLI shell, use the PowerShell version of the command below. PowerShell requires you to escape the characters in the JSON payload. 
+
     *YourIotHubName*. Replace this placeholder below with the name you chose for your IoT hub.
     
     ```azurecli
     az iot hub device-twin update -d simDevice --desired '{"conditions":{"temperature":{"warning":98, "critical":107}}}' -n {YourIoTHubName}
     ```
+    ```azurepowershell
+    az iot hub device-twin update -d simDevice --desired '{\"conditions\":{\"temperature\":{\"warning\":98, \"critical\":107}}}' -n {YourIoTHubName}
+    ```
 
 1. In the first CLI session, confirm that the simulated device outputs the property update.