EP2487859

A method for authenticating client devices from a conference call server, wherein the conference call server includes a memory for storing conference call scheduling information with respect to scheduled conference call sessions, and wherein the conference call server is in communication with an enterprise server. The method includes receiving in the conference call server a communication from a client device with respect to a scheduled conference call session, and determining whether the client device is associated with the enterprise server, and if so authenticating the client device with respect to the scheduled conference call session.