You can set values for headers in the same way as setting values in other elements of a message.
Add the appropriate headers
to your message map using the Add or Remove Headers and
Folders dialog box as described in Mapping headers and folders. If you set any values in the target
LocalEnvironment, set the Mapping mode property for the Mapping node to a value that
contains LocalEnvironment. To do this, select the mapping node in
your message flow and click .
You cannot map headers that are not listed.