Begin by opening Outlook 2016 for Mac.
Click on Accounts
Click +v and choose Exchange in order to configure a new Exchange email account.
Enter your email address, username and password. Click Add Account.
A window may appear that indicates the connection was redirected to outlook.office365.com, this is normal and you may feel free to allow the response from the server.
After successfully authenticating you should see the following screen. A green ‘light’ next to the account name indicates that your email account is successfully configured with Microsoft Office 365 service.