Hi,
There are no RAPIs manipulating the pocket outlook directly. You need to build a dll or application that resides on the device and uses POOM to manage the outlook data. The desktop then communicate with the dll or app with Rapi or something else.
Here is a related discussion for your reference:
http://forums.microsoft.com/MSDN/ShowPost.aspx?PostID=153921&SiteID=1
Best Regards
Chunsheng Tang