-You can use tbe [`APPLICATIONINSIGHTS_AUTHENTICATION_STRING`](./functions-app-settings.md#applicationinsights_authentication_string) setting to enable connections to Application Insights using Microsoft Entra authentication. The value contains either `Authorization=AAD` for a system-assigned managed identity or `ClientId=<YOUR_CLIENT_ID>;Authorization=AAD` for a user-assigned managed identity. The managed identity must already be available to the function app, with an assigned role equivalent to [Monitoring Metrics Publisher](/azure/role-based-access-control/built-in-roles/monitor#monitoring-metrics-publisher). For more information, see [Microsoft Entra authentication for Application Insights](../azure-monitor/app/azure-ad-authentication.md).|
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