Call Azure Function from Data Factory using Managed Service Identity

Question

I want my Data Factory's Web Activity to authenticate to my Azure Function using MSI (Managed Service Identity), so I don't have to include the API key in the Web-URL.

What type of resource string do I need to enter here in the configuration section of the Web Activity:

I tried:

• https://myfunctionapp.azurewebsites.net/
• https://myfunctionapp.azurewebsites.net/api/myfunction

but none worked. The pipeline activity times out after a few minutes with the error "Error calling the endpoint".

Answer 1

I had the same issue, but using https://management.azure.com/ as the resource string worked for me in terms of making MSI function, but after a bunch of testing it seems to me as though the HTTPTrigger still requires a key in either the URI or the header.

Both of these websites are good resources:

• https://learn.microsoft.com/en-us/azure/app-service/app-service-managed-service-identity
• https://learn.microsoft.com/en-us/azure/active-directory/managed-service-identity/services-support-msi