Migrate to MQTT broker on Azure IoT Edge by 31 March 2023

On 31 March 2023, Event Grid on Azure IoT Edge public preview will be retired. Before that date, please transition to standard messaging protocol for IoT (MQTT) on Azure IoT Edge. Applications using Event Grid on IoT preview release will no longer be supported after 31 March 2023.

With the MQTT broker on Azure IoT Edge, you’ll be able to provide granular messaging between devices and connect to Azure IoT Edge Hub with ease. Here’s a quick comparison between Event Grid on Azure IoT Edge and MQTT broker on Azure IoT Edge.

Event Grid on Azure IoT Edge	MQTT broker on Azure IoT Edge
Publishing and subscribing to events locally/cloud Forwarding events to Event Grid Forwarding events to IoT Hub React to Blob Storage events locally	Connectivity to IoT Edge hub Publish and subscribe on user-defined topics Publish and subscribe on IoT Hub topics Publish and subscribe between MQTT brokers

From now through 31 March 2023, Event Grid on Azure IoT Edge preview version will not roll out new features and bug fixes. Critical security updates will be implemented.

Required action 
Review pricing and follow the detailed steps to transition from Event Grid on IoT Edge to the IoT Edge native capabilities.