Open User Mailbox

If mailbox delegation has been setup, follow the instructions below to access the delegated mailbox:

  1. Login to Office 365 (
  2. Click the profile icon
  3. Click the 'Open another mailbox...' link
  4. Enter the last name or username of the mailbox you are searching for
  5. Click the 'Search Directory' link; a link will be displayed showing the mailbox
  6. Click the 'Open' button to display the mailbox