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Call Function App from Azure Data Factory with Managed Identity Authentication

Raven_Zhang's avatar
Raven_Zhang
Icon for Microsoft rankMicrosoft
Jul 22, 2025
Integrating Azure Function Apps into your Azure Data Factory (ADF) workflows is a common practice. To enhance security beyond the use of function API keys, leveraging managed identity authentication ...
Updated Jul 22, 2025
Version 3.0
azure app service
azure functions
azure paas
skucab's avatar
skucab
Copper Contributor
Dec 16, 2025

Thanks for the article! Do you know if it works with Flex Consumption plan? I followed the instruction and it fails with unauthorized status code:

Call to provided Azure function 'http_trigger' failed with status-'Unauthorized' while invoking 'GET' on 'https://<function-name>.azurewebsites.net' and message - 'Invoking Azure function failed with HttpStatusCode - Unauthorized.'

  • skucab's avatar
    skucab
    Copper Contributor
    Dec 17, 2025

    I've found that it actually works with the Flex plan. The issue was in the function code, where we need to set:

    "authLevel": "anonymous"