Expectations on how social intranets will improve knowledge sharing and collaboration in enterprises are high. Yet research into user patterns of traditional SNSs demonstrates participatory divides, and differences in use can be expected with social intranets. In this paper we report on the findings from a study of the adoption–process of a social intranet into an international ICT company. Two archetypical users are described: the contributor and the reluctant user. This study suggests that different user–patterns will remain significant over time.