try phpgroupware

http://www.phpgroupware.org/

time consuming to setup but well worth it.  The shared calendars are
awesome.  There's also the Horde project http://www.horde.org/

Jim Streit wrote:
> Does anyone know of a way to replace an Exchange 5.5 server with a 
> Linux solution that would provide all of the same functionality for my 
> outlook client.  I currently use the Exchange server for e-mail, 
> contacts, notes, tasks, calendars and public folders.   The Exchange 
> server has been giving me real problems on a regular basis over the 
> last 5 months, and I’m going to have to upgrade or replace it with-in 
> the next couple of months.  
> 
> I know that outlook isn’t the best e-mail client out there, but I don’t 
> want to have to deal with hundreds of whiny users at this point.  I 
> would like to keep my outlook clients and all of the functionality, but 
> replace the back-end with something other then Exchange, yet have it 
> tied into our NT domain for the users.
> 
> What’s your thought?
> 
> Jim Streit
> 
> 
> _______________________________________________
> Twin Cities Linux Users Group Mailing List - Minneapolis/St. Paul, Minnesota
> http://www.mn-linux.org
> tclug-list at mn-linux.org
> https://mailman.mn-linux.org/mailman/listinfo/tclug-list