add connection string disclaimer

Author: craigshoemaker

articles/azure-web-pubsub/howto-integrate-app-service.md

@@ -12,6 +12,9 @@ ms.date: 05/17/2023
 
 A new class of applications is reimagining what modern work could be. While [Microsoft Word](https://www.microsoft.com/microsoft-365/word) brings editors together, [Figma](https://www.figma.com) gathers up designers on the same creative endeavor. This class of applications builds on a user experience that makes us feel connected with our remote collaborators. From a technical point of view, user's activities need to be synchronized across users' screens at a low latency.
 
+> [!NOTE]
+> Raw connection strings appear in this article for demonstration purposes only. When you deploy your application, [secure your connection with `WebPubSubServiceClient`](./howto-create-serviceclient-with-net-and-azure-identity) to maintain a secure connection.
+
 ## Overview
 In this how-to guide, we take a cloud-native approach and use Azure services to build a real-time collaborative whiteboard and we deploy the project as a Web App to Azure App Service. The whiteboard app is accessible in the browser and allows anyone can draw on the same canvas.
 
@@ -81,6 +84,9 @@ In order to follow the step-by-step guide, you need
     ```
 
 1. Show and store the value of `primaryConnectionString` somewhere for later use.
+
+    Raw connection strings appear in this article for demonstration purposes only. When you deploy your application, [secure your connection with `WebPubSubServiceClient`](./howto-create-serviceclient-with-net-and-azure-identity) to maintain a secure connection.
+
     ```azurecli-interactive
     az webpubsub key show \
       --name "whiteboard-app" \

articles/azure-web-pubsub/quickstart-serverless.md

@@ -23,6 +23,9 @@ In this tutorial, you learn how to:
 > - Configure Azure Authentication
 > - Configure Web PubSub Event Handler to route events and messages to the application
 
+> [!NOTE]
+> Raw connection strings appear in this article for demonstration purposes only. When you deploy your application, [secure your connection with `WebPubSubServiceClient`](./howto-create-serviceclient-with-net-and-azure-identity) to maintain a secure connection.
+
 ## Prerequisites
 
 # [JavaScript Model v4](#tab/javascript-v4)
@@ -789,6 +792,8 @@ Use the following commands to create these items.
 
 1. Configure the `WebPubSubConnectionString` for the function app:
 
+   Raw connection strings appear in this article for demonstration purposes only. When you deploy your application, [secure your connection with `WebPubSubServiceClient`](./howto-create-serviceclient-with-net-and-azure-identity) to maintain a secure connection.
+
    First, find your Web PubSub resource from **Azure Portal** and copy out the connection string under **Keys**. Then, navigate to Function App settings in **Azure Portal** -> **Settings** -> **Configuration**. And add a new item under **Application settings**, with name equals `WebPubSubConnectionString` and value is your Web PubSub resource connection string.
 
 ## Configure the Web PubSub service `Event Handler`