An email address identifies the account that messages should be delivered (e.g., bbadger@wisc.edu). An account can have multiple email addresses. Each account in Office 365 has only one primary address, but an account can have multiple alternate addresses. An account will accept email for any email address on the account.

Microsoft's previous email and calendar application for Mac OS computers. Support for Entourage ended on May 31, 2012. The new client is called Outlook for Mac.

Exchange ActiveSync (also known as EAS) is a communications protocol designed for the synchronization of email, contacts, calendar, tasks, and notes from a messaging server to a smartphone or other mobile devices. The protocol also provides mobile device management and policy controls.

A service -- similar to IMAP, POP3, and ActiveSync -- that works to transfer and synchronize email/calendar information between the server and the end user's client.