How To: Add Shared Mailbox To Outlook Desktop Profile
- Expand "Advanced options"
- Check the box "Let me set up my account manually"
- Enter the email address of the shared mailbox
- Click "Connect"
- When asked to enter the password for the shared mailbox, click "Sign in with another account"
- Sign in with your own company email address
- Check the box, and use the slider to pick how much email to cache offline
- Click "Next"
- Click "Done"
- Restart Outlook