Digital objects are managed in a controlled way through the complete value chain by DRM systems. Access Control Frameworks manage access by users to resources. This paper presents a solution that enables users of both systems to work collaboratively. It is based on the definition of an interoperability Broker that provides users of both systems with transparent access and use of content taking into account users’ roles and content usage rules. It consists of modules that provide interoperability between digital rights and access control rules, between protected digital objects and digital resources and to manage the user’s roles in both systems ; Postprint (published version)