[exim] Deliver mail normally + deliver a copy to exchnage

Hi!

I'm searching for a way to deliver my mail in exim in normal way
(alias,local user,...) but additionnaly copy RECEIVED mail to remote
exchange server.

Currently I have try a new router:

exchange2003:
     driver = manualroute
     domains = +local_domains
     transport = remote_smtp
     route_list = * 192.168.123.254

but when enabling this router all mail go to this remote smtp and no
mail are keeping local on my exim?

So I would like to keep my /var/mail/%user% growing + a copy to exchange
remote smtp

Any idea???

Regards