On the low level, you would need to change the value of the
PR_CLIENT_SUBMIT_TIME MAPI property using CDO 1.21/ Redemption / Extended
MAPI.
On the Outlook Object Model level, MailItem.SentOn propety is read-only.

--
Dmitry Streblechenko (MVP)
http://www.dimastr.com/
OutlookSpy - Outlook, CDO
and MAPI Developer Tool
-
"Richard Brice" wrote in message
...
We develop simulation environments for training and serious-gaming.

In a current simulator, we intend on using Outlook and Exchnage for
electronic messaging but have an issue with the sent timestamp. There is
the real time and the mission time (i.e. the time the training session is
running at). Mission time and real time are not the same.

We would like the sent field to be timestamped with the mission time. We
can create a dll or service that provides a alternative clock source for
the mission time, naturally the real time would be provided by the system
clcok.

How can Outlook be configured to use an alternate time source, in this
case the mission time?

What is the format of the time and the interface mechanisms of the
alternative clock?