In order to explain these phenomenon, there are several research approaches explaining that the use of knowledge management systems (KMS) supports the knowledge sharing behaviors in organizations and that these systems enable effective and efficient knowledge sharing (Garud and Kumaraswamy 2005). Therefore, research investigating the organizational and the individual adoption decision to use KMS is well-established in information systems (IS) research to explain the success of KMS. Based on general theories and models of individual acceptance, research provides theoretical and empirical evidence for factors explaining the initial usage decision of these systems. In addition to these theories IS research provides evidence for continuous intention to use an IS (Bhattacherjee 2001) and for usage behaviors ingeneral (Burton-Jones and Straub 2006). Moreover, IS research explains the beliefs and attitudes towards an information that might change over time (Bhattacherjee and Premkumar 2004).