If you have a Mac, then you will notice that you in System Preferences, you can add Google, iCloud, Yahoo, AOL, and more accounts to your Macintosh, but there is no option to add a Microsoft Account.

Why should you add your accounts to your Mac?

 The primary reasons why one might want to add their Internet Accounts to their Mac would be to read and send Email using Mac Mail, see their Contacts in the built-in Contacts app, and access their Calendar using iCal (not to be confused with the iCalendar ics format). Additional benefits would include access to Notes in the Notes app and to-do lists in the Reminders app.

Adding the Microsoft Account 

In the Internet Accounts section of System Preferences, click the + button. Then, click “Exchange”. Type your information, which is your full name, your email address for your Microsoft Account, and your Microsoft Account password. If you have 2FA enabled, you need to generate an App Password and use that.