Digital collaboration platforms can be used as central components for corporate knowledge management. Especially in global multi-brand companies, these systems are subject to a large number of requirements. These requirement include legal aspects, such as who is allowed to work together with whom. Furthermore, cultural and organizational conditions must be considered; e. g. the different languages and cultures within the group or the large number of similar IT applications. Using the Volkswagen Group as case study, this article structures existing challenges. We then analyze, how Volkswagen addresses them using two central IT applications, a wiki and an enterprise social network. Because both system provide, at least partially, similar functionalities, a clear differentiation is necessary. Users are provided with use case scenarios for both tools, which are based on the respective strengths of the applications. This clear separation causes that a work process of a knowledge worker is not covered exclusively by an application. A reasonable integration based on the use cases is necessary. The article then depicts the potentials and limits of the implemented solution and gives an outlook on future challenges.