Remove Windows Authentication from PowerBI Report Server

Hi hellodfkh ,

It's crucial to ensure that your custom authentication method is correctly set up and that all necessary services, including SQL Server, are properly configured to recognize and work with this custom authentication.

More details:Configure custom or forms authentication on the report server - SQL Server Reporting Services (SSRS) | Microsoft Learn

Configure the web portal to pass custom authentication cookies - SQL Server Reporting Services (SSRS) | Microsoft Learn

Ensure that SQL Server is configured to accept the type of authentication you're implementing. If you're moving away from Windows Authentication, make sure SQL Server is set up to accept SQL Server Authentication or the specific custom authentication you're using.

Change server authentication mode - SQL Server | Microsoft Learn

How to Get Your Question Answered Quickly 

If it does not help, please provide more details.

Best Regards
Community Support Team _ Rongtie

If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.