I need to figure out how to log a user in automatically when visiting an asp.net web page that requires forms authentication.
The case is:
I'm extending our corporate ASP.NET intranet site with a third party webapplication through an iframe. Our intranet uses windows authentication, but the page I'm accessing from the third party provider through the iframe, requires forms authentication. The credentials are however only the AD username as username and password.
How can I get the page to login automatically when a user visits the page witout redirecting to login.aspx?
I've tried some google searches but come up with nothing of use.