The 2nd ORCA Users Meeting is aimed at providing deeper insight into all functionalities of ORCA to users. We offer special topical clinics ranging from tips for beginners, answers to frequent questions up to discussions on advanced problems. The 2nd ORCA User Meeting will take place on September 5th and 6th, 2016 at the Max Planck Institute for Chemical Energy Conversion in Muelheim an der Ruhr, Germany.