Since, 2011, the Research Data Centre (FDZ) of the Federal Employment Agency (BA) at the Institute for Employment Research (IAB) in Nuremberg, Germany provides remote access to confidential micro data for approved data users. By implementing the so-called Research-Data Center-in-Research Data Center approach data users can access FDZ data from the premises of institutions (other RDCs, data enclaves, etc.) which share comparable standards with regard to data protection and the perseverance of confidentiality as the FDZ. Starting with four external sites in Germany and one site in the US, the FDZ will expand this remote network both in Europe and in the US in 2013. In order to achieve this ambitious goal, several technical and organizational measures need to be implemented. In addition to this, legal concerns have to be removed and funding needs to be ensured. The presentation will describe how the lessons learned from setting up the initial sites influenced this expansion and to what extend new challenges have to be faced. Starting and establishing an international operating remote network turned out to be a complex and ambitious task. But expanding and sustaining such a network is an additional challenge to overcome.