Merge pull request #100122 from tfitzmac/0103rg

clarify resourcegroup function usage

Author: PRMerger13

articles/azure-resource-manager/templates/template-functions-resource.md

@@ -665,7 +665,7 @@ The **managedBy** property is returned only for resource groups that contain res
 
 ### Remarks
 
-The `resourceGroup()` function can't be used in a template that is [deployed at the subscription level](deploy-to-subscription.md). It can only be used in templates that are deployed to a resource group.
+The `resourceGroup()` function can't be used in a template that is [deployed at the subscription level](deploy-to-subscription.md). It can only be used in templates that are deployed to a resource group. You can use the `resourceGroup()` function in a [linked or nested template (with inner scope)](linked-templates.md) that targets a resource group, even when the parent template is deployed to the subscription. In that scenario, the linked or nested template is deployed at the resource group level. For more information about targeting a resource group in a subscription level deployment, see [Deploy Azure resources to more than one subscription or resource group](cross-resource-group-deployment.md).
 
 A common use of the resourceGroup function is to create resources in the same location as the resource group. The following example uses the resource group location for a default parameter value.