Merge pull request #107532 from timlt/jedi3

Add note to article for vnet support

Author: PRMerger20

articles/iot-hub/iot-hub-bulk-identity-mgmt.md

@@ -14,14 +14,17 @@ ms.author: robinsh
 
 Each IoT hub has an identity registry you can use to create per-device resources in the service. The identity registry also enables you to control access to the device-facing endpoints. This article describes how to import and export device identities in bulk to and from an identity registry. To see a working sample in C# and learn how you can use this capability when cloning a hub to a different region, see [How to Clone an IoT Hub](iot-hub-how-to-clone.md).
 
-[!INCLUDE [iot-hub-basic](../../includes/iot-hub-basic-whole.md)]
+> [!NOTE]
+> IoT Hub has recently added virtual network support in a limited number of regions. This feature secures import and export operations and eliminates the need to pass keys for authentication.  Initially, virtual network support is available only in these regions: *WestUS2*, *EastUS*, and *SouthCentralUS*. To learn more about virtual network support and the API calls to implement it, see [IoT Hub Support for VNETs](https://go.microsoft.com/fwlink/p/?linkid=2122101).
 
 Import and export operations take place in the context of *Jobs* that enable you to execute bulk service operations against an IoT hub.
 
 The **RegistryManager** class includes the **ExportDevicesAsync** and **ImportDevicesAsync** methods that use the **Job** framework. These methods enable you to export, import, and synchronize the entirety of an IoT hub identity registry.
 
 This topic discusses using the **RegistryManager** class and **Job** system to perform bulk imports and exports of devices to and from an IoT hub's identity registry. You can also use the Azure IoT Hub Device Provisioning Service to enable zero-touch, just-in-time provisioning to one or more IoT hubs without requiring human intervention. To learn more, see the [provisioning service documentation](/azure/iot-dps).
 
+[!INCLUDE [iot-hub-basic](../../includes/iot-hub-basic-whole.md)]
+
 ## What are jobs?
 
 Identity registry operations use the **Job** system when the operation: