Merge pull request #125755 from v-jaswel/aca/v-jaswel_work_item_357253_20250207

[ACA] [357253] Add note that App Insights must allow local auth for OTel

Author: ttorble

articles/container-apps/opentelemetry-agents.md

@@ -4,7 +4,7 @@ description: Learn to record and query data collected using OpenTelemetry in Azu
 services: container-apps
 author: craigshoemaker
 ms.service: azure-container-apps
-ms.date: 01/29/2025
+ms.date: 02/07/2025
 ms.author: cshoe
 ms.topic: how-to
 ---
@@ -57,7 +57,7 @@ The only configuration detail required from Application Insights is the connecti
 
 The connection string contains an instrumentation key, which is a unique identifier used to associate telemetry to a specific Application Insights resource. Instrumentation keys aren't security tokens or security keys, and aren't considered secrets.
 
-If you want to protect your Application Insights resource from misuse, see [Microsoft Entra authentication for Application Insights](/azure/azure-monitor/app/azure-ad-authentication#microsoft-entra-authentication-for-application-insights).
+If you want to protect your Application Insights resource from misuse, see [Microsoft Entra authentication for Application Insights](/azure/azure-monitor/app/azure-ad-authentication#microsoft-entra-authentication-for-application-insights). However, the Application Insights resource must [allow local authentication](/azure/azure-monitor/app/azure-ad-authentication#disable-local-authentication) to receive data from the OpenTelemetry data agent.
 
 # [ARM template](#tab/arm)