If you are using a custom authentication extension, you should configure the web portal to transmit custom authentication cookies. Otherwise, the web portal will only transmit cookies through HTTP requests specific to the report server. If you want to transmit additional cookies, you must modify the RSReportServer.Config file.
Modifying the RSReportServer.Config File
You can enable the web portal to transmit additional cookies through to the report server by adding a <PassThroughCookies> element to the web portal configuration settings in the RSReportServer.config file. Transmitting additional cookies is helpful in a single sign-on authentication solution that requires not only the report server authentication cookies, but also cookies from a third-party authentication system.
To enable additional cookies to be transmitted through HTTP requests when using the web portal, set the following elements in the RSReportServer.config file:
<UI> <CustomAuthenticationUI> ... <PassThroughCookies> <PassThroughCookie>cookiename1</PassThroughCookie> <PassThroughCookie>cookiename2</PassThroughCookie> </PassThroughCookies> </CustomAuthenticationUI> ... </UI>
Authentication with the Report Server
RsReportServer.config Configuration File
Security Extensions Overview
Configure and Administer a Report Server (SSRS Native Mode)
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