Mail is the webmail component of Outlook on the web. An update on Augrenamed OWA to 'Outlook on the web', often referred to in brief as simply 'Outlook'. Outlook Web Access was later renamed Outlook Web App. Renamed XMLHttpRequest and standardized by the World Wide Web Consortium, it has since become one of the cornerstones of the Ajax technology used to build advanced web apps. It soon became a part of Internet Explorer 5. The first component to allow client-side scripts to issue HTTP requests ( XMLHTTP) was originally written by the Outlook Web Access team. The first customer version was shipped as part of the Exchange Server 5.0 release in early 1997. An early working version was demonstrated by Microsoft Vice President Paul Maritz at Microsoft's famous Internet summit in Seattle on December 27, 1995.

Outlook Web Access was created in 1995 by Microsoft Program Manager Thom McCann on the Exchange Server team. Outlook Web App 2013 on Internet Explorer 11