We are attempting to create and save a recurring task to an MSG file. We are able to do so successfully. However, when we open the MSG file using Outlook, we noticed the that “Recurrence” option button is not selected (see attached RecurrenceButtonIsUnselected.jpg).
After doing [some research ](http://hackipedia.org/Protocols/Microsoft%20Windows/UNSORTED/MS-OXPROPS%20Exchange%20Server%20Protocols%20Master%20Property%20List%20%28v20110315%29.pdf)
we found that in order for the button to be selected the PidLidTaskFRecurring
property needed to be set to true. We were able to verify this by looking at a Task which was created via Outlook (see attached Correct.jpg).
We’ve attempted to use your Api to set this property. However, it appears that the property is not written to the MSG file.
I have attached a demo project which demonstrates the problem. The application is a slight modification to one I found in your help documentation.