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 Im going to have to upgrade or replace it with-in the next couple of months. I know that outlook isnt the best e-mail client out there, but I dont 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. Whats your thought? Jim Streit