The IT Center offers a Unified Messaging System to all institutions of the RWTH Aachen. The RWTH is the first university in NRW that provides UMS. Therefore, we host a central UMS server that runs IXI-UMS by Servonic GmbH as UMS software. We chose this software because it is the only UMS software that is compatible to the heterogenic IT environment of the RWTH. Our aim is to allow using the UMS system with all e-mail clients.