To add another mailbox to Outlook, you must first submit a Help Desk ticket to request access if you have never accessed the mailbox before. Then proceed with the following:
- Open Outlook
- Click the "FILE" menu
- Click the "Account Settings" button and choose "Account Settings..."
- On the "E-mail" tab, Select your existing email account, click "Change..."
- Choose "More Settings.."
- Choose "Advanced"
- Choose "ADD" and enter the name of your additional account
- Click "OK"
- Click "Next"
- Click "Finish"
- Restart Outlook