enable Outlook Contacts as an email Address Book programatically or via registry

[Chris Stenson]

I need to create new Outlook profiles for my users following a migration
from 5.5>2003 (Inter-org). Whether or not I use the Exprofre tool to update
the profile it always leaves the 'show this folder as an e-mail address
book' box in the Outlook Address Book tab unticked. This will be very
annoying to my users and would seem to be such a simple thing to fix but I
can't find a way to do it other than manually ticking the box.

Any help appreciated.

Chris S