The Rhein-Main-Verkehrsverbund (RMV) will be using Microsoft Dynamics 365 in future. With the cloud-based business applications suite, RMV achieves a 360-degree view of its private and business customers. Thanks to the integrated CRM application, all customer processes can be designed transparently, evaluated according to target group and systematized. With 2.5 million passengers a day, this is a must. The deep integration of the solution into the existing IT infrastructure was realized by the transport association together with the IT consultants from PTA IT-Beratung in Mannheim.