Sent Messages missing from webmail download

I had a few hundred emails on my webmail server and finally got Outlook set up. When I hit "Send/Receive", it appeared to have downloaded everything, with the exception of the Sent Messages. Any idea how to get them, or where it might have put them other than the Sent Items folder? Some, but definitely not all, of my sent items are still on the webmail server, so I think they may be somewhere in Outlook.

Thanks,
david