If it is to run on linux (the server that is), check out openmail from HP.  I
have to deal with Exchange at work and haven't found a client yet that can deal
with things like the calendaring features and stuff.

http://freshmeat.net/projects/openmail/?highlight=openmail

> ...when I am being forced to consider another email server
> other than the qmail we have now.
> 
> I need some of the "features" exchange server has to offer in terms
> of shared calendars, etc within Outlook.
> 
> Anyone have something to consider? Hate to see Linux go :-(
> 
> Mike
> mgcon@getnet.com
> http://www.getnet.com/~mgcon
> Phoenix, AZ
> USA