Merge pull request #110992 from mamccrea/patch-50

Update what-is-azure-databricks.md

Author: PRMerger8

articles/azure-databricks/what-is-azure-databricks.md

@@ -7,7 +7,7 @@ ms.reviewer: jasonh
 ms.service: azure-databricks
 ms.workload: big-data
 ms.topic: overview
-ms.date: 05/08/2019
+ms.date: 04/10/2020
 ms.author: mamccrea
 ms.custom: mvc
 ---
@@ -81,6 +81,11 @@ Azure Databricks provides enterprise-grade Azure security, including Azure Activ
 * Azure Databricks roles-based access enables fine-grained user permissions for notebooks, clusters, jobs, and data.
 * Enterprise-grade SLAs. 
 
+> [!IMPORTANT]
+>
+> Azure Databricks is a Microsoft Azure first-party service that is deployed on the Global Azure Public Cloud infrastructure. All communications between components of the service, including between the public IPs in the control plane and the customer data plane, remain within the Microsoft Azure network backbone. See also [Microsoft global network](https://docs.microsoft.com/azure/networking/microsoft-global-network).
+
+
 ## Integration with Azure services
 
 Azure Databricks integrates deeply with Azure databases and stores: SQL Data Warehouse, Cosmos DB, Data Lake Store, and Blob Storage.