draft of changes

Author: johnmarco

articles/openshift/quickstart-portal.md

@@ -5,7 +5,7 @@ author: johnmarco
 ms.author: johnmarc
 ms.service: azure-redhat-openshift
 ms.topic: quickstart
-ms.date: 11/30/2021
+ms.date: 02/14/2023
 ms.custom: mode-ui
 ---
 
@@ -32,6 +32,9 @@ Create a service principal, as explained in [Use the portal to create an Azure A
         *	Select **Master VM Size** and **Worker VM Size**.
 
     ![**Basics** tab on Azure portal](./media/Basics.png)
+    
+    > [!NOTE]
+    > In the **Domain name** field, you can either specify a domain name (e.g., *example.com*) or a prefix (e.g., *abc*) that will be used as part of the auto-generated DNS name for OpenShift console and API servers. This prefix is also used as part of the name of the resource group (e.g., *aro-abc*) that is created to host the cluster VMs.
 
 4. On the **Authentication** tab of the **Azure Red Hat OpenShift** dialog, complete the following sections.
 

articles/openshift/tutorial-create-cluster.md

@@ -94,6 +94,9 @@ A Red Hat pull secret enables your cluster to access Red Hat container registrie
 
 When running the `az aro create` command, you can specify a custom domain for your cluster by using the `--domain foo.example.com` parameter.
 
+> [!NOTE]
+> Although adding a domain name is optional when creating a cluster through Azure CLI, a domain name is needed when adding a cluster through the portal. See [Quickstart: Deploy an Azure Red Hat OpenShift cluster using the Azure portal](quickstart-portal.md#create-an-azure-red-hat-openshift-cluster) for more information. 
+
 If you provide a custom domain for your cluster note the following points:
 
 * After creating your cluster, you must create 2 DNS A records in your DNS server for the `--domain` specified: