Azure Function Connection to MS Fabric SQL endpoint results in Login Failed

JohnP_RI — Fri, 18 Aug 2023 19:38:09 GMT

Has anyone successfully connected to a Fabric SQL endpoint using user/system assigned identities or a service principal?

I have my service principal(s) in an azure security group and that group has permissions to the lakehouse/SQL endpoint (validated by also having a user in that group), however when connecting with any of these Service Principal types I get 18456 Login Failed.

If anyone has, can you please share how you did it? (connection string format, what type of identity etc).

Thanks!

Re: Azure Function Connection to MS Fabric SQL endpoint results in Login Failed

JohnP_RI — Mon, 21 Aug 2023 19:31:27 GMT

Figured this out:

In PowerBI, go to the Admin Portal
Make sure you are a PowerBI administrator and can see the “Tenant Settings” section on the Admin Portal

In this section, 2 things need to be turned on:

Developer Settings -> Allow service principals to create and user profiles
OneLake Settings -> Users can access data stored in OneLake with apps external to Fabric

Now you can manage permissions on the workspace you want to access from your AZ Function. When you add a user to the permissions, you can type in the name of the AZ Function rather than a user. (assuming you've already created a system generated identity)
Now you can use the "Azure Directory Default" authentication method in the connection string.

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Azure Function Connection to MS Fabric SQL endpoint results in Login Failed

Re: Azure Function Connection to MS Fabric SQL endpoint results in Login Failed