When send emails from Outlook, is it possible to change the From address that is saved in the Sent folder?

My username in the GAL is rlam@blah but everyone knows my email as rey@blah. However when sending from Outlook the From address is always saved as rlam@blah instead of the rey@blah.

rey@blah is in the alias and the canonical entry. From Outlook I can login as rey@blah and when sending it still saves it as rlam@blah.

The web interface and my Mulberry IMAP client works as expected and saves it as rey@blah.

Is there another version of the Outlook connector that will fix this?