Overview of Outlook on the Web
Outlook on the Web, formerly known as OWA, is the web interface that enables users to connect to their email accounts via a web browser, without requiring the installation of Microsoft Outlook or other email clients.
Outlook on the Web includes mail, calendar, people/contacts, and task.
Fully supported web browsers give users access to features such as conversation view, Inbox rules, the reading pane, and the Scheduling Assistant. Browsers that aren't fully supported can still be used, but users will see the light version of Outlook on the web, which has fewer features.
If you are experiencing issues accessing your M365 or Outlook on the web account, please clear out all cookies/cache within the browser. Alternately, you try using an alternate browser or private/incognito tab.
You may access your account at the Office 365 sign-in page or by going to Outlook.com
Note: To sign in to Office 365 using another account, select Use another account the next time you sign in.
To prevent Outlook on the web from signing you in to your work or school account automatically, clear the Keep me signed in check box the next time you sign in to Office 365.