Microsoft Exchange Server is an email, calendaring, contact, scheduling and collaboration platform that gives users the ability to access the messaging platform from mobile devices, desktops and web-based systems. Users collaborate through calendar and document sharing while storage and security features let organisations archive content, perform searches and execute compliance tasks. It is also known for its high availability (HA) features that ensure continued service in various outage scenarios.

A hybrid deployment offers organisations the ability to extend the experience to the cloud. This type of deployment can also serve as an intermediate step to moving completely to Exchange Online.