Concerning the expanding online communication bandwidth and the importance of using enterprise portals and the attention to information management in organizations based on E-Commerce, in the orded to increase productivity and competitive power, effective and efficient use of organizational information portals is essential. To this end, the purpose of this research is to identify and build a relationship using structural-interpretive modeling between the functions of an organization’s information portal to increase productivity in the online business workspace. This research is practical in terms of purpose and descriptive terms of nature. For this purpose, in the first step, the dimensions of the model, theoretical literature, and interviewing with experts including professors and related specialists (management and IT) were identified. In the next step, a structural-interpretive modeling method was used in order to build a relationship between the dimensions and the model presentation. In this method, the research model was presented based on expert’s opinions and analysis. The research results illustrate the process of acquiring knowledge management through other identified functions of organizational information portals in the workspace, showing that communication with professionals leads to three dimensions of faster and more structured access to information as well as collaboration that will create integrated information. Finally, this knowledge management is formed through integrated information. Overall, the research showed that using organizational information portals and optimizing its applications at the company level can be achieved one of the most important components in the management of online business companies that is knowledge management.