Experiences and problems during setting up of actual CSWC - offering working environments have an important impact on the conception of Cooperative Buildings. Infrastructure for CSCW working environments must deal with a set of very inhomogeneous needs, e.g., media and device control, access control, communication capabilities, cooperation aware software etc. For reaching an adequate usability of the advanced functionality, especial for no computer experts, a high integration effort is necessary. The Room Management System (RMS) is a generic tool for observing and controlling activities within a distributed CSCW environment. It groups desktop objects of different users in one view, thus making available central actions on a group of user desktop objects. Additionally it controls the access to media and devices by the different users.