I
f the option of Zimbra Open Sources Edition is not enough and still weanting something more – The Zimbra Network Edition is a way to try – which gives a extra Level – using the Server as the Groupware that binds the company together.
I’ve bought a perpertual Liccense for 50 Users, but if I want to upgrade the server, you’ll need a support license for beeing able to upgrade the server after license time. To protect the Machines interface, its best protected behind a Firewall like PF-Sense otr a Cisco.