Edited Microsoft Container Registry description

Author: jispar

articles/virtual-network/service-tags-overview.md

@@ -78,7 +78,7 @@ By default, service tags reflect the ranges for the entire cloud. Some service t
 | **HDInsight** | Azure HDInsight. | Inbound | Yes | No |
 | **Internet** | The IP address space that's outside the virtual network and reachable by the public internet.<br/><br/>The address range includes the [Azure-owned public IP address space](https://www.microsoft.com/download/details.aspx?id=41653). | Both | No | No |
 | **MicrosoftCloudAppSecurity** | Microsoft Cloud App Security. | Outbound | No | No |
-| **MicrosoftContainerRegistry** | Azure Container Registry. | Outbound | Yes | Yes |
+| **MicrosoftContainerRegistry** | Container registry for Microsoft container images. <br/><br/>*Note:* Please also whitelist following IP (this dependency will be removed soon): 204.79.197.219. | Outbound | Yes | Yes |
 | **ServiceBus** | Azure Service Bus traffic that uses the Premium service tier. | Outbound | Yes | Yes |
 | **ServiceFabric** | Azure Service Fabric. | Outbound | No | No |
 | **Sql** | Azure SQL Database, Azure Database for MySQL, Azure Database for PostgreSQL, and Azure SQL Data Warehouse.<br/><br/>*Note:* This tag represents the service, but not specific instances of the service. For example, the tag represents the Azure SQL Database service, but not a specific SQL database or server. | Outbound | Yes | Yes |