How to sign out of Outlook on the web?
To sign out of Outlook on the web: Select your account picture at the top of the screen. If you don't see your picture at the top of screen, check to see if ad blocking is turned on. Sometimes this prevents the picture from showing. Select Sign out.
How to sign in to Microsoft 365?
Go to the Microsoft 365 sign-in page or to Outlook.com. Enter the email address and password for your account. Select Sign in. Note: To sign in to Microsoft 365 using another account, select Use another account the next time you sign in.