I’ve just been given permission to announce we’re targeting the release of the updated MAPICDO which will support Exchange 2013 to coincide with the release of Exchange 2010 SP3.
Exchange 2010 SP3 was announced a while back on the Ehlo blog. As you can see from that announcement, SP3 provides much needed changes to allow for coexistence between Exchange 2010 and Exchange 2013. The updated MAPICDO is part of this work.
I don’t have dates for SP3, but you can track the Ehlo blog for that.
The (very late) October 2012 Release (build 220.127.116.116) is live: http://mfcmapi.codeplex.com.
As part of my work to get MFCMAPI and MrMAPI working well in side-by-side scenarios where both Outlook 2013 and an earlier version of Outlook are installed, I’ve added a –version switch to MrMAPI. This will help us ship builds of OCAT that work properly in these situations
Here's a change list - see the Issue Tracker on Codeplex for more details, or look at the code: