Called out incompatibility with agent

Author: AarDavMax

articles/azure-monitor/app/api-custom-events-metrics.md

@@ -2,7 +2,7 @@
 title: Application Insights API for custom events and metrics | Microsoft Docs
 description: Insert a few lines of code in your device or desktop app, webpage, or service to track usage and diagnose issues.
 ms.topic: conceptual
-ms.date: 05/11/2020
+ms.date: 09/07/2022
 ms.devlang: csharp, java, javascript, vb
 ms.custom: "devx-track-js, devx-track-csharp"
 ms.reviewer: mmcc
@@ -1139,14 +1139,21 @@ To determine how long data is kept, see [Data retention and privacy](./data-rete
 * [Node.js SDK](https://github.com/Microsoft/ApplicationInsights-Node.js)
 * [JavaScript SDK](https://github.com/Microsoft/ApplicationInsights-JS)
 
-## Questions
+## Frequently asked questions
 
-* What exceptions might `Track_()` calls throw?
+### What exceptions might `Track_()` calls throw?
 
-    None. You don't need to wrap them in try-catch clauses. If the SDK encounters problems, it will log messages in the debug console output and, if the messages get through, in Diagnostic Search.
-* Is there a REST API to get data from the portal?
+None. You don't need to wrap them in try-catch clauses. If the SDK encounters problems, it will log messages in the debug console output and, if the messages get through, in Diagnostic Search.
 
-    Yes, the [data access API](https://dev.applicationinsights.io/). Other ways to extract data include [export from Log Analytics to Power BI](./export-power-bi.md) and [continuous export](./export-telemetry.md).
+### Is there a REST API to get data from the portal?
+
+Yes, the [data access API](https://dev.applicationinsights.io/). Other ways to extract data include [export from Log Analytics to Power BI](./export-power-bi.md) and [continuous export](./export-telemetry.md).
+
+### Why are my calls to custom events and metrics APIs ignored?
+
+The Application Insights SDK isn't compatible with auto-instrumentation. If auto-instrumentation is enabled, calls to <code class="notranslate">Track()</code> and other custom events and metrics APIs will be ignored.
+
+Turn off auto-instrumentation in the Azure Portal on the Application Insights tab of the App Service page or set <code class="notranslate">ApplicationInsightsAgent_EXTENSION_VERSION</code> to <code class="notranslate">disabled</code>.
 
 ## <a name="next"></a>Next steps