Folders changes on the device are not supported on Windows Mobile ActiveSync devices
Posted by Matt Kuebler on 16 November 2009 04:21 PM

Windows Mobile ActiveSync:

Although the Windows Mobile ActiveSync device allow adding, editing, or deleting folders on the device, this is not supported by NotifyLink.

Therefore, if a user adds a folder on the device, it will be deleted immediately.
Attempts to edit or delete a native folder will not be successful.