Linux clients for Exchange (email and) calendar [closed]
Evolution can communicate with the Exchange server.
To connect to the Exchange 2007 server, you need to install the mapi-exchange package. http://library.gnome.org/users/evolution/stable/usage-mainwindow-starting.html.en#second-step
Thunderbird with the Lightning extension. I use this combination via DavMail gateway to get seamless access to Exchange. Works perfectly (and is much better/faster than Outlook 2007).
Have you tried Evolution? I used it for a while against an exchange server, and had no problem with calendar items.