We still use Exchange 2003 for 100+ teachers & staff. The number mailboxes would probably increase to 150+ in the next 3 years. Is it better to just keep Exchange 2003 or move to 2010? From what I gather, it takes a lot of time, patience, and talent to manage an Exchange 2010 server but I wanted things to be simpler and easier.
Replace Exchange 2003 with Zimbra or a similar product
Stay with Exchange 2003
Migrate to Exchange 2010
What's your opinion?