> - The Event Hub-compatible name and endpoint of the IoT Hub built-in Events endpoint change after failover. When receiving telemetry messages from the built-in endpoint using either the event hub client or event processor host, you should [use the IoT hub connection string](iot-hub-devguide-messages-read-builtin.md#read-from-the-built-in-endpoint) to establish the connection. This ensures that your back-end applications continue to work without requiring manual intervention post failover. If you use the Event Hub-compatible name and endpoint in your back-end application directly, you will need to reconfigure your application by [fetching the new Event Hub-compatible name and endpoint](iot-hub-devguide-messages-read-builtin.md#read-from-the-built-in-endpoint) after failover to continue operations.
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