Updates related to OpenTelemetry.

Author: RohitRanjanMS

articles/azure-functions/configure-monitoring.md

@@ -3,7 +3,7 @@ title: Configure monitoring for Azure Functions
 description: Learn how to connect your function app to Application Insights for monitoring and how to configure data collection.
 ms.service: azure-functions
 ms.topic: how-to
-ms.date: 08/06/2024
+ms.date: 05/19/2025
 ms.custom: devdivchpfy22
 
 # Customer intent: As a developer, I want to understand how to configure monitoring for my functions correctly, so I can collect the data that I need.
@@ -298,6 +298,7 @@ You can use the [`APPLICATIONINSIGHTS_AUTHENTICATION_STRING`](./functions-app-se
 
 >[!NOTE]  
 >There's no Entra authentication support for local development.
+>Entra authentication for ingestion using the Application Insights SDK is available exclusively in public clouds. However, OpenTelemetry-based data collection supports Entra authentication across all cloud environments, including sovereign clouds.
 
 The value contains either `Authorization=AAD` for a system-assigned managed identity or `ClientId=<YOUR_CLIENT_ID>;Authorization=AAD` for a user-assigned managed identity. The managed identity must already be available to the function app, with an assigned role equivalent to [Monitoring Metrics Publisher](/azure/role-based-access-control/built-in-roles/monitor#monitoring-metrics-publisher). For more information, see [Microsoft Entra authentication for Application Insights](/azure/azure-monitor/app/azure-ad-authentication).
 

articles/azure-functions/dotnet-isolated-process-guide.md

@@ -3,7 +3,7 @@ title: Guide for running C# Azure Functions in an isolated worker process
 description: Learn how to use the .NET isolated worker model to run your C# functions in Azure, which lets you run your functions on currently supported versions of .NET and .NET Framework.
 ms.service: azure-functions
 ms.topic: conceptual
-ms.date: 09/05/2024
+ms.date: 05/19/2025
 ms.custom:
   - template-concept
   - devx-track-dotnet
@@ -128,8 +128,7 @@ var builder = FunctionsApplication.CreateBuilder(args);
 
 builder.Services
     .AddApplicationInsightsTelemetryWorkerService()
-    .ConfigureFunctionsApplicationInsights()
-    .AddSingleton<IHttpResponderService, DefaultHttpResponderService>();
+    .ConfigureFunctionsApplicationInsights();
 
 builder.Logging.Services.Configure<LoggerFilterOptions>(options =>
     {

articles/azure-functions/opentelemetry-howto.md

@@ -4,7 +4,7 @@ description: This article shows you how to enable export of application logs and
 ms.service: azure-functions
 ms.custom: devx-track-extended-java, devx-track-js, devx-track-python, devx-track-ts
 ms.topic: how-to 
-ms.date: 05/16/2024
+ms.date: 05/19/2025
 zone_pivot_groups: programming-languages-set-functions
 
 #CustomerIntent: As a developer, I want to learn how to enable the export of logs and metrics from my function apps by using OpenTelemetry so I can consume and analyze my application telemetry data either in Application Insights or to any OTLP-compliant tools.
@@ -81,7 +81,7 @@ The way that you instrument your application to use OpenTelemetry depends on you
     ```cmd
     dotnet add package Microsoft.Azure.Functions.Worker.OpenTelemetry --version 1.0.0-preview1 
     dotnet add package OpenTelemetry.Extensions.Hosting 
-    dotnet add package Azure.Monitor.OpenTelemetry.AspNetCore  
+    dotnet add package Azure.Monitor.OpenTelemetry.Exporter  
     ```
 
     ### [OTLP Exporter](#tab/otlp-export) 
@@ -98,7 +98,7 @@ The way that you instrument your application to use OpenTelemetry depends on you
     ### [Application Insights](#tab/app-insights)
 
     ```csharp
-    using Azure.Monitor.OpenTelemetry.AspNetCore; 
+    using Azure.Monitor.OpenTelemetry.Exporter; 
     ```
     ### [OTLP Exporter](#tab/otlp-export) 
 
@@ -113,15 +113,15 @@ The way that you instrument your application to use OpenTelemetry depends on you
 
     ```csharp
     services.AddOpenTelemetry()
-    .UseFunctionsWorkerDefaults()
-    .UseAzureMonitor();
+    .UseAzureMonitorExporter()
+    .UseFunctionsWorkerDefaults();
     ```
     ### [OTLP Exporter](#tab/otlp-export) 
 
     ```csharp
     services.AddOpenTelemetry()
-    .UseFunctionsWorkerDefaults()
-    .UseOtlpExporter();
+    .UseOtlpExporter()
+    .UseFunctionsWorkerDefaults();
     ```
     ---
 
@@ -215,6 +215,8 @@ These instructions only apply for an OTLP exporter:
 
 ::: zone-end  
 ::: zone pivot="programming-language-python"  
+1. Add an application setting named PYTHON_ENABLE_OPENTELEMETRY with value of True.
+
 1. Add this entry in your `requirements.txt` file:
 
     ### [Application Insights](#tab/app-insights)
@@ -278,11 +280,11 @@ These instructions only apply for an OTLP exporter:
 
 When you export your data using OpenTelemetry, keep these current considerations in mind.
 
-+ When the host is configured to use OpenTelemetry, only logs and traces are exported. Host metrics aren't currently exported. 
++ At this time, only HTTP, Service Bus and Event Hub triggers are supported with OpenTelemetry outputs. 
 
-+ You can't currently run your app project locally using Core Tools when you have OpenTelemetry enabled in the host. You currently need to deploy your code to Azure to validate your OpenTelemetry-related updates. 
++ When the host is configured to use OpenTelemetry, the Azure portal does not support log streaming or recent function invocation traces.
 
-+ At this time, only HTTP trigger and Azure SDK-based triggers are supported with OpenTelemetry outputs. 
++ Azure Functions App Diagnostics - App Diagnostics is a useful resource in the Azure portal for monitoring and diagnosing potential issues. Go to your Function App resource. In the left menu, select **Diagnose and solve problems** and search for “Application Insights Missing Logs”. 
 
 ## Related content
 

includes/functions-opentelemetry-preview-note.md

@@ -2,8 +2,9 @@
 author: ggailey777
 ms.service: azure-functions
 ms.topic: include
-ms.date: 05/17/2024
+ms.date: 05/19/2025
 ms.author: glenga
 ---
 > [!IMPORTANT]  
-> OpenTelemetry support for Azure Functions is currently in preview. 
+> OpenTelemetry support for Azure Functions is currently in preview.
+> See the [Supplemental Terms of Use for Microsoft Azure Previews](https://azure.microsoft.com/support/legal/preview-supplemental-terms/) for legal terms that apply to Azure features that are in beta, preview, or otherwise not yet released into general availability.