Outlook 2016/2019/365 on Mac - Adding an Additional Mailbox


How do I add an additional Exchange mailbox in Outlook 2019/2016/365


You may have multiple mailboxes that you use for work.

Relates To (Environment)

  • Oregon State University
    • Employee
      • MacOS
        • Outlook 2019
        • Outlook 2016
        • Outlook 365


  1. With an Outlook window open, go to the Outlook > Preferences menu.
  2. Click on Accounts
  3. Click Add Email Account or use the icon in the lower left corner of the window, and select Exchange
  4. Enter the Email address for the mailbox you want to open, and click Continue.
    For your personal mailbox, this will look like First.Last@oregonstate.edu
  5. Fill out other account information.
    1. In the DOMAIN\username field, employees should use their ONID username in the format ONID\username
      Student employees with CN accounts should use CN\username

    2. In the Password field, employees should use their ONID password.
      Student employees with CN accounts should use their CN account password.
    3. In the Server field, enter outlook.office.com
      Users who have not yet migrated to Exchange Online should use exmail.oregonstate.edu . If you're unsure, contact your IT support team.
  6. Exchange Online users may see a different prompt to log in on the Microsoft Federation Services page.
    1. By default, the username field will be filled with the email address of the mailbox you're trying to add. Do not try to log in with this email address.
    2. In the username field, enter your ONID username in the format myusername@oregonstate.edu
    3. In the password field, enter your ONID password
    4. If your ONID credentials don't work, contact your IT support team.
  7. When finished, click Add Account
  8. To add another mailbox, click Add Another Account and repeat from step 4. Otherwise, click Done.
  9. Optional: Set a display name for the mailbox you added. By default, Outlook will use the email address as a display name.

For assistance, contact the IS Service Desk.

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Article ID: 45713
Wed 1/3/18 1:47 PM
Mon 7/6/20 8:34 AM