Use DefaultItemType. That's the only other supported property for that.

 Hi,
 I'm working on exporting and importing items. While exporting, I'm
maintaining an extra information about the folder hierarchy in XML format
and also all the items that have been exported in a separate XML file. Now,
before importing, I'm rebuilding the folder hierarchy in the destination
Outlook using the folder XML file.

 But the problem which I'm facing is that the containers like Inbox, Sent
Items, etc. folders don't expose type of folder property, however, all the
child folders do it. Also, the RSS Feeds folder exposes the type as
"IPF.Note.OutlookHomepage", whereas all sub-folders expose it as "IPF.Note".

 Basically, I'm querying DASL
http://schemas.microsoft.com/mapi/proptag/0x3613001E to get the value of
type of folder. And I want to get assured of some standard in the types of
folder that are exposed by Outlook through this property.

 Is there some other property which ensures the type of folder to be a
standard one or is there any existing standard which I can take as base
while implementing the folder hierarchy import in the Outlook.

 --
 Regards,
 Amit Bhandari