Merge pull request #264212 from KennedyDenMSFT/US201366

User Story 201366: Added note before autoinstrumentation table

Author: prmerger-automator[bot]

articles/azure-monitor/app/codeless-overview.md

@@ -27,6 +27,9 @@ The following table shows the current state of autoinstrumentation availability.
 
 Links are provided to more information for each supported scenario.
 
+> [!NOTE]
+> If your hosting environment or resource provider is not listed in the following table, autoinstrumentation is not supported. You can manually instrument your code using Application Insights SDKs or Azure Monitor OpenTelemetry Distros. For more information, see [Data Collection Basics of Azure Monitor Application Insights](opentelemetry-overview.md).
+
 |Environment/Resource provider                    | .NET Framework                                                                                                                                        | .NET Core / .NET                                                                                                                                      | Java                                                                                                                                                      | Node.js                                                                                                                                                                                      | Python                                                                                           |
 |-------------------------------------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|--------------------------------------------------------------------------------------------------|
 |Azure App Service on Windows - Publish as Code   | [ :white_check_mark: :link: ](azure-web-apps-net.md) ¹                                                                                                | [ :white_check_mark: :link: ](azure-web-apps-net-core.md) ¹                                                                                           | [ :white_check_mark: :link: ](azure-web-apps-java.md) ¹                                                                                                   | [ :white_check_mark: :link: ](azure-web-apps-nodejs.md) ¹                                                                                                                                    | :x:                                                                                              |