In Outlook for Mac, you can set up your work or school email (Office 365 or Microsoft Exchange-based accounts), and personal email accounts (Outlook.com, iCloud, Yahoo!), by using only your email address and password. Here’s how:
On the setup page, click Add Account.
Click Exchange or Office 365
Complete your account information and click Add Account. This screen shows the account set up page for Exchange or accounts with Office 365 subscriptions.
You can also add additional accounts from the TOOLS tab.
All the accounts you add will show in the folder pane.