Manage Mailboxes page shows list of existing mailboxes with additional information as:

• Display Name - shows name of the mailbox. 
• Login - shows login name.
• Email Address - shows email address.
• Mailbox Size - shows total size of the mailbox.
• Mailbox Type - shows type of the mailbox.
• Status - shows status of the mailbox.
• Actions - allow admins to perform various actions.