Merge pull request #287824 from madsd/sessionaffinityproxy

Session affinity proxy

Author: prmerger-automator[bot]

articles/app-service/configure-common.md

@@ -4,7 +4,7 @@ description: Learn to configure common settings for an App Service app. App sett
 keywords: azure app service, web app, app settings, environment variables
 ms.assetid: 9af8a367-7d39-4399-9941-b80cbc5f39a0
 ms.topic: article
-ms.date: 06/04/2024
+ms.date: 10/03/2024
 ms.custom: devx-track-csharp, devx-track-azurecli, devx-track-azurepowershell, AppServiceConnectivity
 ms.devlang: azurecli
 author: cephalin
@@ -446,7 +446,8 @@ Here, you can configure some common settings for the app. Some settings require
     - **Always On**: Keeps the app loaded even when there's no traffic. When **Always On** isn't turned on (default), the app is unloaded after 20 minutes without any incoming requests. The unloaded app can cause high latency for new requests because of its warm-up time. When **Always On** is turned on, the front-end load balancer sends a GET request to the application root every five minutes. The continuous ping prevents the app from being unloaded.
 
         Always On is required for continuous WebJobs or for WebJobs that are triggered using a CRON expression.
-    - **ARR affinity**: In a multi-instance deployment, ensure that the client is routed to the same instance for the life of the session. You can set this option to **Off** for stateless applications.
+    - **Session affinity**: In a multi-instance deployment, ensure that the client is routed to the same instance for the life of the session. You can set this option to **Off** for stateless applications.
+    - **Session affinity proxy**: Session affinity proxy can be turned on if your app is behind a reverse proxy (like Azure Application Gateway or Azure Front Door) and you are using the default host name. The domain for the session affinity cookie will align with the forwarded host name from the reverse proxy. 
     - **HTTPS Only**: When enabled, all HTTP traffic is redirected to HTTPS.
     - **Minimum TLS version**: Select the minimum TLS encryption version required by your app.
 - **Debugging**: Enable remote debugging for [ASP.NET](troubleshoot-dotnet-visual-studio.md#remotedebug), [ASP.NET Core](/visualstudio/debugger/remote-debugging-azure), or [Node.js](configure-language-nodejs.md#debug-remotely) apps. This option turns off automatically after 48 hours.