Microsoft Exchange Server has long been the gold standard in enterprise-level email solutions, but many small businesses have shied away from it due to the cost and complexity of setting up and managing an on-premises server. Fortunately, Microsoft now offers Exchange Online, a cloud-based version of its popular email solution.
Boost productivity and cut costs with Microsoft Exchange Online
Things you need to know about hosted Exchange

Microsoft Exchange is proving to be a reliable and cost-effective email server service, but for many small businesses, the hardware costs that come with it are daunting. But fear not, as there's a good way to still enjoy the benefits of Exchange without heavy server investments -- and that's hosted Exchange services.