Save in Sent Items
To have the system automatically save a copy of the generated message in the Sent Items folder of the user who generates the event,
select this option.
When you click to return to the Event Actions form, the application "wraps" the value of this check box within a SAVEMESSAGE( ) parameter, which yields this final syntax:
SAVEMESSAGE( booleanExpr
)
where booleanExpr is either TRUE or FALSE: