Java API to access MS Exchange

Or you could try to use a third-party software like J-Integra for Exchange that exposes a Java API enabling your Java app to access Exchange Server objects like folders, e-mails, calendar and contact items.

For more information, refer to:
http://j-integra.intrinsyc.com/support/exchange/doc/

Sincerely,
Frankie Ragasa
J-Integra Interoperabilit y Solutions...