http://blogs.msdn.com/mstehle/archive/tags/Outlook+Add-Ins/default.aspxTags: Outlook Add-Insen-USCommunityServer 2.1 SP1 (Build: 61025.2)http://blogs.msdn.com/mstehle/archive/2009/05/26/fyi-in-outlook-2010-exhcange-client-extensions-are-gone.aspxTue, 26 May 2009 16:32:00 GMT91d46819-8472-40ad-a661-2c78acb4018c:9641427mstehle1http://blogs.msdn.com/mstehle/comments/9641427.aspxhttp://blogs.msdn.com/mstehle/commentrss.aspx?PostID=9641427http://blogs.msdn.com/mstehle/rsscomments.aspx?PostID=9641427<P>On the Outlook team blog it was <A href="http://blogs.msdn.com/outlook/archive/2009/05/04/announcing-the-deprecation-of-exchange-client-extensions.aspx" mce_href="http://blogs.msdn.com/outlook/archive/2009/05/04/announcing-the-deprecation-of-exchange-client-extensions.aspx">announced</A> recently that Exchange Client Extensions (ECEs) will not work with Outlook 2010.&nbsp; This shouldn’t come as a big surprise, they haven’t been a primary extensibility model for Outlook since Outlook 97-98 days.&nbsp; However, many Outlook developers have continued to maintain their ECEs and Microsoft supports them to work on Outlook versions up to Outlook 2007.&nbsp; Here are the suggestions from the blog post about how to move forward…</P> <BLOCKQUOTE> <P><EM>“To redesign your solution, you should consider the following options:</EM></P> <UL> <LI><EM>Rewrite your ECE as a COM Add-in using native or managed code. Unlike ECEs, an add-in represents a strategic extensibility technology that is fully supported in Outlook 2010. Using an Outlook add-in, you can build </EM><A href="http://msdn.microsoft.com/en-us/library/bb226713.aspx" mce_href="http://msdn.microsoft.com/en-us/library/bb226713.aspx"><EM>Outlook form regions</EM></A><EM> and extend the </EM><A href="http://msdn.microsoft.com/en-us/office/aa905530.aspx" mce_href="http://msdn.microsoft.com/en-us/office/aa905530.aspx"><EM>Office Fluent User Interface</EM></A><EM>. For additional information, please visit the </EM><A href="http://msdn.microsoft.com/en-us/office/aa905455.aspx" mce_href="http://msdn.microsoft.com/en-us/office/aa905455.aspx"><EM>Outlook Developer Portal</EM></A><EM> on MSDN. </EM></LI> <LI><EM>Rewrite your ECE as a Windows service application using native code and MAPI. If you are writing a Windows service application, you must use MAPI to access Outlook items rather than the Outlook object model.”</EM> </LI></UL></BLOCKQUOTE><img src="http://blogs.msdn.com/aggbug.aspx?PostID=9641427" width="1" height="1">Outlook GeneralDevMsgTeamOutlook Add-Ins