Not in Outlook Object Model. In Extended MAPI/CDO 1.21/Redemption, you can
check if the folder's associated (hidden) contents table contains a message
with the message class (PR_MESSAGE_CLASS) equal to "IPC.MS.REN.USERFIELDS".

Dmitry Streblechenko (MVP)
http://www.dimastr.com/
OutlookSpy - Outlook, CDO
and MAPI Developer Tool

"Rog" wrote in message
...
Is it possible to determine if a UserProperty exists in a folder without
looping through each item to check it's UserProperties?
Thanks
Rog