Office 365 (Outlook 2019 Mac) - How to Add Additional Email Accounts
1. Select the Tools tab.
2. Click on the Accounts icon.
3. In the Accounts window select the + sign then select New Account...
4. A new window will display asking you to enter your e-mail address, and then your password for the new e-mail account.
5. You are now done adding an additional e-mail account.