How To: Open Shared Mailbox Outlook Desktop
  1. Click the "File" menu option.
  1. Click "Account Settings".
  2. Click "Account Name and Sync Settings"
  1. Click "More Settings"
  1. Click "Add"
  1. Enter the name of the mailbox.
  2. Click Ok.
  1. Click Ok again.
  1. Click the X in the top right.