Microsoft Exchange is a hosted enterprise messaging facility which provides the benefits of a cloud-based email service with the robust capabilities of on-premises Microsoft Exchange Server deployment.

With Microsoft Exchange, clients are provided with large mailbox size, together with anywhere-access to data across PCs, the web and mobile devices.

Microsoft 365 is the next step in business productivity, bringing together the features and functionality of Microsoft Office, Microsoft SharePoint, Microsoft Exchange and Microsoft Lync in an always-up-to-date cloud service.

As part of office 365, Exchange Online delivers a robust hosted messaging solution as cloud based service.