After using Custom Authorization in Power BI report server, I cannot add the group in the Row level security section

Question

After use Custom Authorization in power bi report server in Row level security part cannot assign group of database And also I checked the codes of Authorization.cs, AuthenticationUtilities.cs and AuthenticationExtension.cs classes, I didn't find a method related to Row level security that I can develop.

I was able to develop the security part that checks the permission of each report based on the group and users of my database, but I ran into trouble in the Row level security part and I did not find a method to develop.

Answer 1

there is no way to handle groups in RLS in custom auth.

https://github.com/microsoft/Reporting-Services/issues/188

and

If you're using custom authentication in Power BI Report Server, [USERNAME()] returns the username format you’ve set up for users.

Row-level security (RLS) in Power BI Report Server

So in your model you set up RLS rules based on the username format you passed from your custom auth extension.