Get Ready To Master the Online Version of Microsoft’s Email, Calendar, and People Apps! Learn to communicate anywhere with Outlook Online – the web-based app for managing emails, calendars, and people – with this Outlook Online Essentials (2017) training course. Sometimes you need a quick way to get to your “stuff” no matter where you are. Microsoft Outlook Online, also called the Outlook Web App (OWA), is a convenient and powerful way to access your email, calendar, and contacts (People) from any web browser. Throughout this Outlook Online Essentials (2017) course, you will learn the main features and benefits of using Outlook Online from Office 365. The interface is very similar if you are using Outlook Online from your company as well.