title: Identity registry replication
body: <p>I am designing an IoT solution's Disaster Recovery approach on Azure. I am following <a href="https://docs.microsoft.com/en-us/azure/iot-hub/iot-hub-ha-dr" rel="nofollow noreferrer">IoT Hub High Availability and DR</a> in MSDN. The solution need to keep keep geo-replicated backups of device identities from primary, and upload them to the secondary IoT hub before switching the active endpoint for the devices. 
  I am not able to find out any documentation on how to take backup of Identity Registry from primary and upload it in secondary.</p>