I believe that the just released Evolution2 has Ximian Connector built in... Not sure though.
Press release says:
WALTHAM, Mass. — May 11, 2004 — Novell today announced its Connector for Microsoft* Exchange Server will be integrated into EvolutionTM 2.0 and made available as open source, beginning today with the current Connector 1.4. Evolution is Novell's award-winning e-mail and workgroup client for Linux* systems and is the most widely used collaboration suite on Linux. Evolution Connector allows Microsoft Exchange Server 2000/2003 users to easily manage their e-mail, calendars, group schedules, address books, public folders and tasks from Linux desktops.