Create functions-app-insights-disable-local-note.md

Author: ggailey777

includes/functions-app-insights-disable-local-note.md

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+---
+author: ggailey777
+ms.service: azure-functions
+ms.topic: include
+ms.date: 07/11/2024
+ms.author: glenga
+---
+
+>[!NOTE]
+>When using `APPLICATIONINSIGHTS_AUTHENTICATION_STRING` to connect to Application Insights using Microsoft Entra authentication, you should also [Disable local authentication](../articles/azure-monitor/app/azure-ad-authentication.md#disable-local-authentication). This configuration allows you to ingest telemetry authenticated exclusively by Microsoft Entra ID and prevents data access by using API keys.
+