Power BI Report Server with custom authentication (2025)

fabio78 — Tue, 13 Jan 2026 12:12:11 GMT

Hi everyone, I'm new and I'm trying to configure Power BI Report Server with custom authentication. I installed a standard Windows Server 2025, SQL Server 2025, and the Power BI Report Server evaluation version. I wanted to know how to configure custom authentication via a web form login page. Is there a guide available? I'm not very experienced, so I'd need the steps. Another question: does the new version of Power BI Report Server support custom authentication?

Thank you in advance.

Regards

Re: Power BI Report Server with custom authentication (2025)

dpeyras — Tue, 13 Jan 2026 16:52:10 GMT

Hi,

You will find a similar topic here:

https://community.fabric.microsoft.com/t5/Report-Server/Power-BI-Report-Server-Custom-Form-Authentication-Challenge/m-p/870519

Regards,

Denis

Re: Power BI Report Server with custom authentication (2025)

Zanqueta — Tue, 13 Jan 2026 18:06:34 GMT

Hi fabio78, the architecture remains the same as previous versions. You can implement custom authentication by creating a Security Extension using .NET and registering it in the Report Server configuration. There is no native web form login feature, so you must build it yourself.

Steps to Configure Custom Authentication

Here’s the high-level process:

1. Develop a Custom Security Extension

Create a .NET class library implementing the following interfaces:
- IAuthenticationExtension
- IAuthorizationExtension
These handle:
- Authentication: Validate user credentials from your web form.
- Authorization: Define roles and permissions.

Microsoft provides a sample here:
https://learn.microsoft.com/en-us/sql/reporting-services/extensions/security-extension-sample

2. Deploy the Extension

Copy your compiled DLL to:

C:\Program Files\Microsoft Power BI Report Server\PBIRS\ReportServer\bin

Update rsreportserver.config:
- Add your custom extension under <Authentication> and <Security> sections.
Update rssrvpolicy.config to grant permissions to your assembly.

3. Configure the Login Page

Create a custom ASP.NET page for login.
On successful login, issue an authentication cookie or token that your extension validates.
Redirect users to the Report Server portal.

4. Restart Services

Restart the Power BI Report Server service after changes.

Important Considerations

No official support for forms authentication out-of-the-box; everything is custom.
Ensure HTTPS is enabled for security.
Test thoroughly because custom extensions bypass standard Windows security.
Keep in mind that Power BI Report Server does not support Azure AD authentication—only custom or Windows.

References:

Extensions security for Azure Arc-enabled servers - Azure Arc | Microsoft Learn

Security extensions overview - SQL Server Reporting Services (SSRS) | Microsoft Learn

If this response was helpful in any way, I’d gladly accept a 👍much like the joy of seeing a DAX measure work first time without needing another FILTER.

Please mark it as the correct solution. It helps other community members find their way faster (and saves them from another endless loop 🌀.

topic Re: Power BI Report Server with custom authentication (2025) in Report Server

Power BI Report Server with custom authentication (2025)

Re: Power BI Report Server with custom authentication (2025)

Re: Power BI Report Server with custom authentication (2025)

Steps to Configure Custom Authentication

1. Develop a Custom Security Extension

2. Deploy the Extension

3. Configure the Login Page

4. Restart Services

Important Considerations

References: