(clug-talk) infomation on replacing a Windows Web Exchange server with LinuxAlternative

[Darcy Brodie, CJL]

Hello
   I am looking for some information inregards to replacing (preferably 
before my company goes with the Micro$oft option) a Micro$oft Web 
Exchange server with a Linux option.  I have been doing some searching, 
and found Kolab, which, with an available plug in, will work with 
Outlook on the desktop.
My concern with this is that
   1- It is still labeled beta (Stable, but beta)
   2 - Is it possible to access this from remote locations over the web 
as if the person was sitting in their office? (email, Address Book,  
Calander, and Task list are the main                 items they are 
looking for remotely )
Or is there other / better solutions for this.  We are looking at 
approximately 100 users, with about 10 that travel and require the 
remote access

Darcy Brodie