- Open Outlook 2010 and click File > Info > Account Settings
- Highlight the account and click Change
- Click More Settings
- Click on the Advanced Tab then click Add
- Type the name of the account or mailbox address and click OK
- Verify the new mailbox is listed, then click OK to save
- Click Next
- Click Finish – Congratulation! You have successfully entered all the information required to setup the new account
- Click Close
- The new Mailbox will be listed below your primary account