How to add additional mailbox in Outlook
1. To add another mailbox, launch “Microsoft Outlook 2016”
2. Select the “File” tab >
3. Select “Info tab” > “Account Settings”
4. In “Account Settings”, select your current mailbox and click “change”
5. Select “More Settings”
6. Select the “Advanced” tab
7. Select “Add”
8. In the “Add mailbox” field, type the name of mailbox.
9. Select >Apply > OK > Next > Finish > Close > Close