As an Administrator, you have access to the Quarantine for the entire domain. This view shows all quarantined email for every email account in the domain.
Sort the list by clicking on any of the fields along the top: Recipient, Sender, Subject, Date, Size, SpamScore.
View quarantined mail by category, by clicking the appropriate tab: Spam, Virus, Banned (Files), Bad MIME, Bad Header, Unchecked (this is where we put password-protected zip files), Deleted and Recovered (mail that's been deleted or released from Quarantine, respectively), and Blocked.
Select the box next to a line and then options become available: Delete, Recover to Mailbox, Recover & Whitelist Sender, and Whitelist Sender.