OWA sessionid cookie lost when logging into a Tomcat site iframe

we have made an extension to OWA page, connecting to a web application running in Tomcst. The content served by this application is shown in an iframe inside OWA page using isapi. This is working everywhere but in a customer where the session cookies set by OWA (sessionid and cadata ) get deleted as soon as a succesful login is done in the Tomcat application. After this, OWA redirects to its login page. As I said this is happening in only one customer out of about fifty so I g开发者_开发技巧uess it cannot be anything with our application but it must be something in the OWA's IIS configuration. The same behaviour is observed both with IE and Firefox. Any idea? Thanks

Cookies are bound to a specific (sub)domain and path. It sounds like that the login redirects the user to a (sub)domain/path which isn't covered by the cookie. Debug the HTTP headers for sent/received cookies and check the request URL's as well.