Add note to Private Link

Author: baanders

articles/digital-twins/concepts-security.md

@@ -116,6 +116,7 @@ For instructions on how to set up Private Link for Azure Digital Twins, see [Ena
 When working with Private Link for Azure Digital Twins, here are some factors you may want to consider:
 * Pricing: For pricing details, see [Azure Private Link pricing](https://azure.microsoft.com/pricing/details/private-link). 
 * Regional availability: Private Link for Azure Digital Twins is available in all the Azure regions where Azure Digital Twins is available. 
+* Azure Digital Twins Explorer: The [Azure Digital Twins Explorer](concepts-azure-digital-twins-explorer.md) can't access Azure Digital Twins instances that have public access disabled. You can, however, use Azure functions to deploy the Azure Digital Twins Explorer codebase privately in the cloud. For instructions on how to do this, see [Azure Digital Twins Explorer: Running in the cloud](https://github.com/Azure-Samples/digital-twins-explorer#running-in-the-cloud).
 * Maximum number of private endpoints per Azure Digital Twins instance: 10
 * Other limits: For more information on the limits of Private Link, see [Azure Private Link documentation: Limitations](../private-link/private-link-service-overview.md#limitations).