Deferred messages not shown in Outbox

[Canjura]

Hi,

I'm having an issue with a couple of Outlook 2003-SP3 (running on WinXP-SP2)
users who are sending deferred messages. The messages don't stay on their
Outbox but in the "Messages queued for deferred delivery" queue on the
Exchange 2003 Server (SP2).

The messages are delivered propely when the time arrives but the users need
to have them in the Outbox (as expected) in case they want to modify/delete
the messages before they're sent.

If someone can shed some light here it will be greatly appreciated.

Thanks

Juan.