Use the Web Protection > Policy Helpdesk > Quota Status page to review the minutes of quota remaining for users, and to optionally reset the quota for users who are out of time.
To review quota for a user or set of users:
On the Quota Status tab find users you wish to review.
All users who have used some quota time are listed. Use the search text box to search for specific users or Filter Actions to limit results. The minutes remaining for specific users quota are shown.
Select users to reset their quota time.
Select the checkbox next to the users you want to reset, or click the checkbox at the top to select all users that are currently displayed.
Quota time for selected users will be reset so the full quota time is available. Normally quota time for all users resets at midnight.