I had the same problems!
And I am still looking for answers!
I have found a way of working around the outlook!!
samba client and lisa!
enter your username and password and run lisa as root!
Using any mail client that uses pop3 protocol simply use the ip adress of the server! instead of the netbios name!!
do a ping from a dos prompt to find the ip adress!!
Also if you are using MS exchange 2000 this will probably be very useful!
to be able to access all the shared folders and adress books!
I'm still looking around for the proxy but i think it should be feasable! please let me know if anything is found!