cleanup of code, added note about upgrading dns

Author: Nicolas Oman

articles/service-fabric/service-fabric-dnsservice.md

@@ -55,30 +55,29 @@ After you have a template, you can enable the DNS service with the following ste
 
 1. Check that the `apiversion` is set to `2017-07-01-preview` or later for the `Microsoft.ServiceFabric/clusters` resource, and, if not, update it as shown in the following example:
 
-    ```json
+  ```json
     {
         "apiVersion": "2017-07-01-preview",
         "type": "Microsoft.ServiceFabric/clusters",
         "name": "[parameters('clusterName')]",
         "location": "[parameters('clusterLocation')]",
         ...
     }
-    ```
+  ```
 
 2. Now enable the DNS service in one of the following ways:
 
    - To enable the DNS service with default settings, add it to the `addonFeatures` section inside the `properties` section as shown in the following example:
 
-       ```json
-           "properties": {
-              ...
-
-              "addonFeatures": [
-                "DnsService"
-              ],
-              ...
-           }
-       ```
+    ```json
+        "properties": {
+          ...
+          "addonFeatures": [
+            "DnsService"
+          ],
+          ...
+        }
+    ```
    - To enable the service with other than default settings, add a `DnsService` section to the `fabricSettings` section inside the `properties` section. In this case, you don't need to add the DnsService to `addonFeatures`. To learn more about the properties that can be set for the DNS Service, see [DNS Service settings](./service-fabric-cluster-fabric-settings.md#dnsservice).
 
        ```json
@@ -107,7 +106,10 @@ After you have a template, you can enable the DNS service with the following ste
               ]
             }
        ```
-1. Once you have updated the cluster template with your changes, apply them and let the upgrade complete. When the upgrade completes, the DNS system service starts running in your cluster. The service name is `fabric:/System/DnsService`, and you can find it under the **System** service section in Service Fabric explorer. 
+3. Once you have updated the cluster template with your changes, apply them and let the upgrade complete. When the upgrade completes, the DNS system service starts running in your cluster. The service name is `fabric:/System/DnsService`, and you can find it under the **System** service section in Service Fabric explorer. 
+
+> [!NOTE]
+> When upgrading DNS from disabled to enabled, Service Fabric Explorer may not reflect the new state. To solve, restart the nodes by modifying the UpgradePolicy in your Azure Resource Manager template. See the [Service Fabric Template Reference](https://docs.microsoft.com/azure/templates/microsoft.servicefabric/2019-03-01/clusters/applications) for more.
 
 
 ## Setting the DNS name for your service