Microsoft Exchange and Office 365 are cloud based services which can be accessed from Microsoft’s braowser based OWA application. Outlook for desktop continues plays an important for users who want to manage email, calendars, and even OneDrive and Sharepoint services. This capability is really the domain of the power user, however Hosted Exchange connects to Outlook 2007, 2010, and 2013, and Office 365 users can download Microsoft’s most current version of Outlook 2013 for desktop as part of their subscription service.