OpenChange intends to provide a portable implementation of the Microsoft Outlook and Microsoft Exchange protocols. That is, it provides the client and server sides of the Microsoft Exchange RPC (MAPI) protocols.
Information regarding Project Releases and Project Resources. Note that the information here is a quote from Freecode.com page, and the downloads themselves may not be hosted on OSDN.
Portability was improved to include FreeBSD, OpenSolaris, the Intel C Compiler, and the Sun Studio compiler. Preliminary support for Exchange 2003/2007 specific protocols and redirection support were implemented. Support for encrypted communications between client and server has been added. New libmapi functionality was added in server operations, properties, and in convenience functions. Ten new remote operations were added. Bugs were fixed for various libraries and utilities, and the tests were improved. The exchange2ical utility was reworked, which improves interoperability with other ICalender tools.
