Enter your email address in the User Name field, and your password in the Password field (if prompted for password).Enter a name for your account in the Name field.In the Menu bar at the top of your screen, click Mail > Add Account….To configure Apple Mail for Mac for use with your Office 365 email account in Mac OS X, do the following: Configuring Apple Mail for Mac for Office 365 Email and Calendar You may configure Apple Mail email client for Mac OS X for use with your Illinois State University Office 365 email account.