I want to accomplish a Single Sign On from my web application to Report Manager. I am trying to pass a custom cookie from my web application to Report Manager so when it redirects to my login page, I can authenticate the user with the cookie values. I try setting the PassThroughCookies section in the config file but the cookie is still being lost on the Report Manager end. Also, is there a reason why the web.config for Report Manager still has Windows as the form authentication mode The tutorial on security extension states to change the authentication mode to Forms for Report Server but not Report Manager.

Pass custom cookie from external web application to Report Manager