add note about the EnableWorkerIndexing flag

Author: hossam-nasr

articles/azure-functions/durable/quickstart-js-vscode.md

@@ -192,6 +192,17 @@ You now have a Durable Functions app that can be run locally and deployed to Azu
 
 ## Test the function locally
 
+::: zone pivot="nodejs-model-v4"
+
+> [!NOTE]
+> To run the V4 programming model, your app needs to have the `EnableWorkerIndexing` feature flag set. When running locally, this should have already been set in your `local.settings.json` file when creating your project.  To verify, check the following line exists in your `local.settings.json` file. If it doesn't, add it to your file.
+>
+> ```json
+> "AzureWebJobsFeatureFlags": "EnableWorkerIndexing"
+> ```
+
+::: zone-end
+
 Azure Functions Core Tools lets you run an Azure Functions project on your local development computer. You're prompted to install these tools the first time you start a function from Visual Studio Code.
 
 ::: zone pivot="nodejs-model-v3"
@@ -280,6 +291,18 @@ After you've verified that the function runs correctly on your local computer, i
 
 [!INCLUDE [functions-publish-project-vscode](../../../includes/functions-publish-project-vscode.md)]
 
+:: zone pivot="nodejs-model-v4"
+
+## Update app settings
+
+To enable your V4 programming model app to run in Azure, you need to add the `EnableWorkerIndexing` flag under the `AzureWebJobsFeatureFlags` app setting.
+
+1. In Visual Studio Code, press **F1** to open the command palette. In the command palette, search for and select `Azure Functions: Add New Setting...`.
+2. Choose your new function app, type `AzureWebJobsFeatureFlags` for the new app setting name, and press **Enter**.
+3. For the value, type `EnableWorkerIndexing` and press **Enter**.
+
+:: zone-end
+
 ## Test your function in Azure
 
 ::: zone pivot="nodejs-model-v3"

articles/azure-functions/durable/quickstart-ts-vscode.md

@@ -51,7 +51,7 @@ To complete this tutorial:
 
 [!INCLUDE [quickstarts-free-trial-note](../../../includes/quickstarts-free-trial-note.md)]
 
-## <a name="create-an-azure-functions-project"></a>Create your local project 
+## <a name="create-an-azure-functions-project"></a>Create your local project
 
 In this section, you use Visual Studio Code to create a local Azure Functions project. 
 
@@ -195,7 +195,19 @@ You now have a Durable Functions app that can be run locally and deployed to Azu
 
 Azure Functions Core Tools lets you run an Azure Functions project on your local development computer. You're prompted to install these tools the first time you start a function from Visual Studio Code.
 
+::: zone pivot="nodejs-model-v4"
+
+> [!NOTE]
+> To run the V4 programming model, your app needs to have the `EnableWorkerIndexing` feature flag set. When running locally, this should have already been set in your `local.settings.json` file when creating your project.  To verify, check the following line exists in your `local.settings.json` file. If it doesn't, add it to your file.
+>
+> ```json
+> "AzureWebJobsFeatureFlags": "EnableWorkerIndexing"
+> ```
+
+::: zone-end
+
 ::: zone pivot="nodejs-model-v3"
+
 1. To test your function, set a breakpoint in the `Hello` activity function code (*Hello/index.ts*). Press F5 or select `Debug: Start Debugging` from the command palette to start the function app project. Output from Core Tools is displayed in the **Terminal** panel.
 ::: zone-end
 ::: zone pivot="nodejs-model-v4"
@@ -281,6 +293,18 @@ After you've verified that the function runs correctly on your local computer, i
 
 [!INCLUDE [functions-publish-project-vscode](../../../includes/functions-publish-project-vscode.md)]
 
+:: zone pivot="nodejs-model-v4"
+
+## Update app settings
+
+To enable your V4 programming model app to run in Azure, you need to add the `EnableWorkerIndexing` flag under the `AzureWebJobsFeatureFlags` app setting.
+
+1. In Visual Studio Code, press **F1** to open the command palette. In the command palette, search for and select `Azure Functions: Add New Setting...`.
+2. Choose your new function app, type `AzureWebJobsFeatureFlags` for the new app setting name, and press **Enter**.
+3. For the value, type `EnableWorkerIndexing` and press **Enter**.'
+
+:: zone-end
+
 ## Test your function in Azure
 
 ::: zone pivot="nodejs-model-v3"