Interpersonal communication is the basis for almost any type of cooperation. Changing patterns of communication may have an impact on the quality of cooperative work. In this paper, user experiences are described in a long-term groupware project. Communication changes, both planned and unplanned, were examined as a result of the system introduction. Reduced face-to-face communication, task-related and taskunrelated, were found, as well as a changing dissemination of information. Certain losses in interpersonal communication were compensated for by user advocacy and design team-user workshops. It is proposed that with groupware introduction, organizations should consider support for both planned and informal means as compensation for reduced communication.