https://hosted-kerio-connect.com/
Hosted Kerio Connect is email with active sync calender and contacts. A good alternative for the expensive Microsoft Exchange!
kerio connecthostedway
https://www.gfi.com/products-and-solutions/email-and-messaging-solutions/kerio-connect/resources/screenshots?sc_lang=cs-CZ
Screenshots - Kerio Connect
kerio connectscreenshots