Systems and related methods enable a web service to map a unique identifier received from a client to the client's user account in a directory service using an authentication protocol and thereby receive permission to access resources for the client in the service's domain or in a distant domain. When...http://www.google.de/patents/US20040098615?utm_source=gb-gplus-sharePatent US20040098615 - Mapping from a single sign-in service to a directory service
