Once logged in, you'll see the Message Center. Email identified as spam is listed. You have the option to release it (and add it to the Safelist) or delete it with the "Select Action" button on the drop-down list.
Many of the functions of the Message Center can also be performed directly from within the weekly activity summary sent to your account.
Integra's new Ironport-based system is very simple and does not require any configuration on your part.