CalDav Calendar Sync Support

CalDav Protocoll for Calendar Sync, is an defacto Standard, even used by Google Calender, for almost any thirdparty Group/Echange Solutions.

Its a mandatory thing, to support IaaS hosted Groupware like Exchange, Kerio-Conenct with EWS and CalDav Protocoll for Calender Sync Support. 

The best CRM is useless, if Tasks, Notes and Calender Items cant be synced.