Add an Additional / Shared Mailbox to Outlook Open Outlook Click on the File tab Click Add Account 4. Enter in the new mail (for example thematicmeetings@asco.org) 5. Click Connect 6. The We’re getting things ready screen will appear 7. When the Choose account type screen appears, click Exchange 8. Uncheck Set up Outlook Mobile on my phone too 9. Click OK 10. Restart Outlook to get the newly added inbox to appear.