An integrated system of user interfaces for communicating with remote services. A backplane architecture controls and manages the user interfaces by instantiating, launching, overseeing and closing the user interfaces associated with a plurality of applications residing in a remote server. Each application communicates with one another and with the backplane via messaging interfaces. The backplane provides a single uniform user authentication procedure during logon for the user interfaces and also provides session management for a duration of a user session. Session information is maintained by exchanging a session key or keys for identifying the session with remote servers.