> Well, It's like Exchange (server-side) with an equivalent of Outlook Web Access, right?
Yes, as I wrote in my first post it has a web-interface. Contrary to owa, this web-interface actually follow wed standards and has full functionality across browsers. However, I wanted to point out that just like with Exchange you have a full groupware server, with a full featured client with the name of Kontact. The web hasn't really taken over yet, very few prefer owa over outlook. Kolab supports both imap and pop3 for mail, it is for calender, scheduling and contacts you need Kontact or plugins (no carddav or caldav yet I believe). Read more about client options here: http://www.kolab.org/clients