In the Aperture Portal, walk through the following steps to re-authenticate a Box Cloud App.
Click Settings
Click Cloud Apps & Scan Settings
Select the Box account by clicking on the name
Click Reauthenticate
Enter the Box Console Administrator's login credentials and click Authorize
Click Grant access to Box
If successful, you will be returned to the Aperture Portal Settings page along with the message "App re-authenticated". The scan must be manually restarted by clicking Action > Start Scanning.