Digitization has led to a revolution in the retail sector. Terms such as big data, automation, artificial intelligence and connectivity are commonly used to describe ways of working, work content and professions. Along with the concomitant increase in importance of data connectivity and the knowledge potentially resulting therefrom comes an increase in internal portal solutions. Companies anticipate the digital workplace to bring about new, more agile ways of working.In this study internal corporate communication is viewed in the context of the behavioral theory of the firm according to Cyert und March and the symbolic interactionism theory according to Blumer. Critical factors for success of portal-based internal corporate communications of retail companies registered in Germany were investigated and, based on the results, recommendations for managers who are responsible for introducing a communication portal were formulated.