Merge pull request #245263 from KrishnaG-MSFT/patch-315

(AzureCXP) MicrosoftDocs/azure-docs#112082

Author: prmerger-automator[bot]

articles/azure-monitor/app/azure-web-apps.md

@@ -18,6 +18,8 @@ There are two ways to enable monitoring for applications hosted on App Service:
 
   This method is the easiest to enable, and no code change or advanced configurations are required. It's often referred to as "runtime" monitoring. For App Service, we recommend that at a minimum you enable this level of monitoring. Based on your specific scenario, you can evaluate whether more advanced monitoring through manual instrumentation is needed.
 
+  When you enable auto-instrumentation it enables Application Insights with a default setting (it includes sampling as well). Even if you set in Azure AppInsights: Sampling: **All Data 100%** this setting will be ignored.
+
   For a complete list of supported autoinstrumentation scenarios, see [Supported environments, languages, and resource providers](codeless-overview.md#supported-environments-languages-and-resource-providers).
 
   The following platforms are supported for autoinstrumentation monitoring: