[exim] Microsoft Exchange Messages

We have just installed exim to filter out unwanted spam email and it's doing
a wonderful job. Our consultant helped us set up the server to archive
incoming and outgoing messages as well.

We are using the exim server in the dmz and passing acceptable incoming
messages onto Microsoft Exchange for processing. Likewise Exchange passes
outgoing messages to exim to be forwarded onto their destination.

We would like to be able to archive internal email (from user to user within
our domain) messages to the exim server as well but haven't quite figured
out how to accomplish that with Exchange. I am wondering if there is a way
to have Exchange replicate all internal messages passing them to the exim
server for archiving.

Any information on this matter is much appreciated.

Thanks in advance for your help.

Tommy Phipps