added sign up link

Author: tfitzmac

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

@@ -4,15 +4,15 @@ description: Determine what changes will happen to your resources before deployi
 author: mumian
 ms.service: azure-resource-manager
 ms.topic: conceptual
-ms.date: 11/08/2019
+ms.date: 11/11/2019
 ms.author: jgao
 
 ---
 # Resource Manager template deployment what-if operation (Preview)
 
 Before deploying a template, you might want to preview the changes that will happen. Azure Resource Manager provides the what-if operation to let you see how resources will change if you deploy the template. The what-if operation doesn't make any changes to existing resources. Instead, it predicts the changes if the specified template is deployed.
 
-The what-if operation is currently in preview. To use it, you must sign up for the preview. As a preview release, the results may sometimes show that a resource will change when actually no change will happen. We're working to reduce these issues, but we need your help. Please report these issues at [https://aka.ms/armwhatifissues](https://aka.ms/armwhatifissues).
+The what-if operation is currently in preview. To use it, you must [sign up for the preview](https://aka.ms/armtemplatepreviews). As a preview release, the results may sometimes show that a resource will change when actually no change will happen. We're working to reduce these issues, but we need your help. Please report these issues at [https://aka.ms/armwhatifissues](https://aka.ms/armwhatifissues).
 
 You can use the what-if operation with the `New-AzDeploymentWhatIf` PowerShell command or the [Deployments - What If](/rest/api/resources/deployments/whatif) REST operation.