The disclosed embodiments relate to a session continuity feature that allows a user to access an online content management system through different instances of a third-party application located on different computing devices without having to log in to the online content management system separately from each computing device. When the user signs on to the online content management system, the session continuity mechanism provides a session continuity token to the third-party system. When the user subsequently accesses an instance of the third-party application located on another computing device, the third-party system provides the session continuity token to the new instance of the third-party application. This enables the user to access the online content management system through the new instance of the third-party application without having to sign on again.