Setting encryption flag in profile

[Jeff McKay]

When you edit a profile manually, in the Security tab, there is a check box
labeled
"Encrypt data between Outlook and Exchange Server".

My program is creating profiles that connect to Exchange, and I would like
to
enable this check box. By turning this on and off manually, and looking at
the resulting
properties in the profile, it seems clear that the property
PR_PROFILE_CONNECT_FLAGS
controls this - when set to 0, the checkbox is enabled, when set to 2, it is
turned off.

However when I set this property in my program when creating the profile,
then look at
the profile manually, the check box is not enabled. I am certain the
property is being set,
because I read it back later.

Any thoughts on how to do this? Is there some other property I need to set?