FormsAuthentication.RedirectFromLoginPage not working in Iframe

we override authentication for power bi report server and use this sample and every thing is working well but i need to embed my dashboards in asp.net core application (that use asp identity) with iframes and when i loading page for viewing dashboard, iframe show error

desktop-jkskd96 redirected you too many times.

in custom authentication that i installing on power BI report server , logging user is automatically with

FormsAuthentication.RedirectFromLoginPage(username, false);

every thing is OK when i load dashboard URL in browsers directly and user logged in automatically

but in Iframes i have problem

i testing with simple html file and still has problem

[lemmax]

Hello lotfi1008!

This worked for me in Chrome and Edge using embedded HTML iframes:

1. Up-to-date .NET Framework using Windows built-in Check for updates (KB4524420 package required)
2. Add the following yellow parts to c:\Program Files\Microsoft Power BI Report Server\PBIRS\ReportServer\web.config file

This solution works only with HTTPS configuration!

Best regards!

[alextochetto]

Another approach instead set a DNS it’s about changing the URL in iframe like: http://<ssrs server>/ReportServer/Pages/ReportViewer.aspx?<report name>&rs:Embed=true This works for me with and without HTTPS in a development and production environments