Most function apps use Application Insights for telemetry. Today, we’re making the experience of working with Application Insights even better for .NET function apps using the isolated worker model.
Now, you can fully control the emission of telemetry using standard controls available from the Application Insights SDK. For example, through registration in your application startup, you can configure custom filtering rules, adjust log levels, and more.
Please note that any configuration you define in your application startup will only affect logs emitted from your application code. Some logs from the Functions host remain controlled by the `host.json` file. Similarly, the `host.json` file does not impact configuration of logs from your application.
For more info: https://learn.microsoft.com/azure/azure-functions/dotnet-isolated-process-guide#application-insights
