diff --git a/specification/synapse/resource-manager/Microsoft.Synapse/preview/2019-06-01-preview/examples/CreateOrUpdateWorkspace.json b/specification/synapse/resource-manager/Microsoft.Synapse/preview/2019-06-01-preview/examples/CreateOrUpdateWorkspace.json
index 1083a7b95955..f2e336622b5a 100644
--- a/specification/synapse/resource-manager/Microsoft.Synapse/preview/2019-06-01-preview/examples/CreateOrUpdateWorkspace.json
+++ b/specification/synapse/resource-manager/Microsoft.Synapse/preview/2019-06-01-preview/examples/CreateOrUpdateWorkspace.json
@@ -15,7 +15,8 @@
         },
         "sqlAdministratorLogin": "login",
         "sqlAdministratorLoginPassword": "password",
-        "managedVirtualNetwork": "default"
+        "managedVirtualNetwork": "default",
+        "managedResourceGroupName": "workspaceManagedResourceGroupUnique"
       },
       "location": "East US",
       "tags": {
@@ -46,7 +47,7 @@
           },
           "sqlAdministratorLogin": "login",
           "sqlAdministratorLoginPassword": "password",
-          "managedResourceGroupName": "resourceGroup2",
+          "managedResourceGroupName": "workspaceManagedResourceGroupUnique",
           "managedVirtualNetwork": "default",
           "provisioningState": "Succeeded",
           "privateEndpointConnections": [
@@ -90,7 +91,7 @@
           },
           "sqlAdministratorLogin": "login",
           "sqlAdministratorLoginPassword": "password",
-          "managedResourceGroupName": "resourceGroup2",
+          "managedResourceGroupName": "workspaceManagedResourceGroupUnique",
           "managedVirtualNetwork": "default",
           "provisioningState": "Provisioning"
         },
diff --git a/specification/synapse/resource-manager/Microsoft.Synapse/preview/2019-06-01-preview/workspace.json b/specification/synapse/resource-manager/Microsoft.Synapse/preview/2019-06-01-preview/workspace.json
index cf94bd3ca600..96313767601c 100644
--- a/specification/synapse/resource-manager/Microsoft.Synapse/preview/2019-06-01-preview/workspace.json
+++ b/specification/synapse/resource-manager/Microsoft.Synapse/preview/2019-06-01-preview/workspace.json
@@ -756,8 +756,7 @@
           "type": "string"
         },
         "managedResourceGroupName": {
-          "description": "Workspace managed resource group",
-          "readOnly": true,
+          "description": "Workspace managed resource group. The resource group name uniquely identifies the resource group within the user subscriptionId. The resource group name must be no longer than 90 characters long, and must be alphanumeric characters (Char.IsLetterOrDigit()) and '-', '_', '(', ')' and'.'. Note that the name cannot end with '.'",
           "type": "string"
         },
         "provisioningState": {