

In 2015, Microsoft changed the browser client name to "Outlook on the web" and updated it for use with Exchange Server 2016 and Exchange Online in Office 365.

Microsoft also called the browser-based app Outlook Web Access and Exchange Web Connect with earlier versions of Exchange Server. Microsoft named this client Outlook Web App (OWA) when using it with Exchange Server 2010 and Exchange Server 2013. Outlook on the web provides an interface similar to Microsoft Outlook in the Office Suite without requiring the installation of the full desktop email client. Outlook on the web is the browser-based email client for users to access email, calendars, tasks and contacts from Microsoft's on-premises Exchange Server and cloud-based Exchange Online.
