As already mentioned probly use zimbra for email. have a test server currently setup and debating the pros and cons of moving away from exchange.
What would you do about all services you offer through windows i.e AD, ISA, Backup Exec, Email and print management?
This is only going to work if you are good at linux otherwise problems could arise
I was posed the question by a teacher, have we considered moving to a complete linux setup, somethingI have not until now considered, but wit buget constraints etc it migt be worth looking at so any feedback would be useful.