SSRSviewer with windows authentication

Proxy enabled and the following ReportController customization:

    partial void OnHttpClientHandlerCreate(ref HttpClientHandler handler)
        handler.UseDefaultCredentials = true;
        handler.Credentials = new NetworkCredential("domain\\user", "pass");

could receive parameters painel, but with errors on console:

GET http://localhost:5000/ReportServer/Reserved.ReportViewerWebControl.axd?OpType=Resource&Version=12.0.4100.1&Name=Microsoft.Reporting.WebForms.pickforward.gif 404 (Not Found)
Reserved.ReportViewerWebControl.axd:1 Refused to apply style from 'http://localhost:5000/ReportServer/Reserved.ReportViewerWebControl.axd?OpType=Resource&Version=12.0.4100.1&Name=Microsoft.Reporting.WebForms.calendar.css' because its MIME type ('text/html') is not a supported stylesheet MIME type, and strict MIME checking is enabled.

Hi @villar,

I've tried to replicate the problem however on my end everything worked normally:

All resources are served properly.

Best Regards,

Are you using windows authentication in a domain environment?

Security issues. Sample report without parameters worked fine!