Microsoft Exchange, in our opinion is one of the most powerful email servers a business can have. Businesses all over the world choose to use Microsoft Exchange for their heavy / power users who “live” in their email. Real time changes to calendars, to do lists, shared Inboxes, and Contact Groups feature make it a great option for any size company. This service can also be used on the cloud or on your own server.
Microsoft Office 365 is built upon the Exchange server technology.