Disclosed herein is a middleware server for interfacing a Multipoint Conferencing Unit (MCU) with a communication system and/or a management system within the context of an organization. The middleware server uses modular architecture, making the middleware server highly adaptable to different types of communication systems and management systems. The middleware server is useful for interfacing a MCU with communication devices including Plain Old Telephone Service (POTS) telephones, Internet Protocol telephones (IP-phones), and multimedia endpoints and with management applications such as exchange servers and databases. The middleware server is useful for managing multimedia sessions according to organizational policies.