Update iot-hub-devguide-messages-c2d.md

Author: ShawnJackson

articles/iot-hub/iot-hub-devguide-messages-c2d.md

@@ -12,7 +12,7 @@ ms.date: 03/15/2018
 
 # Send cloud-to-device messages from an IoT hub
 
-To send one-way notifications to a device app from your solution back end, send cloud-to-devices messages from your IoT hub to your device. For a discussion of other cloud-to-devices options supported by IoT Hub, see [Cloud-to-device communications guidance](iot-hub-devguide-c2d-guidance.md).
+To send one-way notifications to a device app from your solution back end, send cloud-to-device messages from your IoT hub to your device. For a discussion of other cloud-to-device options supported by Azure IoT Hub, see [Cloud-to-device communications guidance](iot-hub-devguide-c2d-guidance.md).
 
 [!INCLUDE [iot-hub-basic](../../includes/iot-hub-basic-whole.md)]