http://msdn2.microsoft.com/en-us/exchange/aa972636.aspx
New Programmability Features in Exchange Server 2007
A new, major release of Exchange is coming in early December, bringing many new features that make e-mail even more essential to business. Exchange Server 2007 offers built-in protective technologies to keep business moving, reduces spam and viruses, and enables confidential communication. With Exchange Server 2007, employees get anywhere access to their e-mail, voice mail, calendars, and contacts from a variety of clients and devices. Exchange Server 2007 enhances operational efficiency through features like the Exchange Management Shell, based on the new Microsoft PowerShell.
These features definitely make Exchange Server 2007 the best version of Exchange for information workers and the IT Professionals who manage those servers. But what about us developers? Yes, we get some shiny new toys to play with too! Exchange Server 2007 includes new technologies that enable custom applications to go further and connect wider—something that was just not possible in Exchange Server 2003. This article describes some—but not all— of the new programmability features and offers pointers for getting started using them.
What types of applications do people make for Exchange?
Custom applications that work with Exchange have traditionally been grouped into three categories based on what they did: manage servers and recipients, work with mailbox-based content, and customize mail flow. Exchange Server 2007 provides some great improvements for each application type.
(More at source)
- Joel