About Deleting Policy Quarantines

Before you delete a policy quarantine, see if it is associated with any active filters or message actions. See Determining the Filters and Message Actions to Which a Policy Quarantine Is Assigned.
You can delete a policy quarantine even if it is assigned to a filter or message action.
If you delete a quarantine that is not empty, the default action defined in the quarantine will be applied to all messages, even if you have selected the option not to delete messages if the disk is full. See Default Actions for Automatically Processed Quarantined Messages.
After you delete the quarantine associated with a filter or message action, any messages subsequently quarantined by that filter or message action will be sent to the Unclassified quarantine. You should customize the default settings of the Unclassified quarantine before you delete quarantines.
You cannot delete the Unclassified quarantine.