These steps are the same whether you're adding your first email account or additional email accounts to Outlook.

1. Select File > Add Account.

   (If you don't see a File tab, perhaps you are using New Outlook for Windows. Go to New Outlook for instructions."

2. Enter your email address and click Connect.
   
3. If prompted, enter your password again, then select OK > Finish to start using your email account in Outlook.