Please be aware that the Zarafa apps are soon to be obsolete and will only receive updates for a limited time. In its place you can install the Kopano apps, which are already recommended for new installations. Kopano is currently working on an easy way to migrate all data from the Zarafa apps to Kopano and will provide this in time for the End of Life of this app scheduled for the 30. November 2016.
Zarafa WebApp provides a rich client experience in your favorite browser. It offers traditional groupware features and extends your inbox with communication and sharing tools. Don’t settle for restrictive desktop clients or limited web clients: use the perfect blend.