There are some new posts on Tech Net regarding Microsoft Exchange 2007...
Discontinued Features and De-Emphasized Functionality
Here are the development features that are discontinued…
APIs and Development Features
Comments and mitigation
Transport event hooks
Retain a computer that is running Exchange 2000 or Exchange 2003 in the Exchange 2007 organization if you need this functionality.
Workflow Designer that was included with the Exchange 2003 SDK
Use Windows Workflow Services (WWS).
Collaboration Data Objects (CDO) for Workflow that was included with Exchange 2003.
Microsoft Collaboration Data Objects for Exchange Management (CDOEXM)
Exchange Windows Management Instrumentation (WMI) classes
MAPI client and CDO 1.2.1 on the Exchange installation
Exchange 2007 no longer depends on these components. They are a separate component that will be available for download. For more information about how to download the required components, see MAPI client and CDO 1.1.2 and CDO, version 1.2.1.
Here are the development features that are de-emphasized…
“There are legacy Exchange features that are now being deemphasized in Exchange 2007:
Public folders - Free/busy calendaring functionality is provided by the Availability service. If you need additional functionality, migrate to SharePoint Portal Server or a similar product.
Proxy address generators - Use the Exchange Management Shell.
CDO 1.2.1 - This functionality is provided by the Exchange Web Services.
MAPI32 - This functionality is provided by the Exchange Web Services.
CDOEX (CDO 3.0) - This functionality is provided by the Exchange Web Services.
Exchange WebDAV extensions - This functionality is provided by the Exchange Web Services.
ExOLEDB - This functionality is provided by the Exchange Web Services.
Store events - This functionality is provided by the Notification Web service.
Streaming backup APIs.
Exchange 2003 Virus Scanning Application Programming Interface (VSAPI).”
Keep in mind that de-emphasized features will still be supported to work on or against Exchange 2007 but we will strongly discourage you from writing new solutions that use these APIs.
The new development technologies are those that you have problem already heard of, Exchange Web Services (use in place of MAPI, WebDAV, CDO 1.21, CDOEX, and Exchange Store Event Sinks), Transport Agents (use in place of SMTP Event Sinks and the Virus Scan API), Exchange Managed APIs (use in place of CDOSYS, MAPI, and CDOEX), and the Exchange Management Shell (use in place of CDOEXM).
Exchange 2007 SDK
Updated 1/22/2009 – Fixed some broken links.
PingBack from http://blogs.msexchange.org/silva/2006/11/06/exchange-2007-new-features-discontinued-features-and-de-emphasized-functionality/