1. A method comprising: receiving an authentication of a user to a first domain by an application server, the application server being a computing system connected to the first domain and a second domain; establishing a first active session for the user with the first domain by the application server based on the authentication; receiving a request from the user to access content from the second domain at the application server after establishing the first active session; searching for a second active session for the user with the second domain; if no second active session with the second domain is found, then determining whether the first session with the first domain is active; if the first active session with the first domain is found, then establishing a sub-session with the second domain based on and dependent upon the active session with the first domain by the application server; and providing the requested content through the application server to the user based on the established sub-session with the second domain.