Merge pull request #96546 from tfitzmac/1119whatif

added clarification for property change

Author: PRMerger7

articles/azure-resource-manager/template-deploy-what-if.md

@@ -3,7 +3,7 @@ title: Template deployment what-if (Preview)
 description: Determine what changes will happen to your resources before deploying an Azure Resource Manager template.
 author: mumian
 ms.topic: conceptual
-ms.date: 11/12/2019
+ms.date: 11/19/2019
 ms.author: jgao
 ---
 # Resource Manager template deployment what-if operation (Preview)
@@ -90,6 +90,8 @@ Notice at the top of the output that colors are defined to indicate the type of
 
 At the bottom of the output, it shows the sku name (storage account type) will be changed from **Standard_LRS** to **Standard_GRS**.
 
+Some of the properties that are listed as deleted won't actually change. In the preceding image, these properties are accessTier, encryption.keySource and others in that section. Properties can be incorrectly reported as deleted when they aren't in the template but are automatically set during deployment. The final deployed resource will have the values set for the properties. As the what-if operation matures, these properties will be filtered out of the result.
+
 ### Test deletion
 
 The what-if operation supports using [deployment mode](deployment-modes.md). When set to complete mode, resources not in the template are deleted. The following example deploys a [template that has no resources defined](https://github.com/Azure/azure-docs-json-samples/blob/master/empty-template/azuredeploy.json) in complete mode.