How are you "seeing" the Bcc field in your outbound e-mails under the
Sent Items folder in Outlook? Are you *opening* those e-mails to show
them in their own window? Right-click and Open, or double-click on an
item in the Sent Items Folder so the e-mail shows in its own window.
Does the Bcc field show up there (for e-mails where you included a
non-blank Bcc field)?