Revocation is a mechanism that revokes a PDF document that has already been issued. A common use of revocation is to remove rights from an individual when he is no longer authorized or remove access to a document when it becomes out of date or invalid.
Note: To revoke a PDF document/user in an on-premise environment, please refer to Web Service Configuration to configure the web service and SQL first. Then choose the Revocation tool in the Foxit Configuration Tool window and enable the tool by clicking the button 
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To revoke a PDF document, click Document Revocation. Select the PDF document you want to revoke, click Add button to add the document to the Revocation List. Or you can click Browse to select a document from a local drive to add to the Revocation List. To remove the revocation, please select the document in the Revocation List and click Remove button.
To revoke a user, click User Revocation. Click Add button to add a user to the User Revocation List. To remove the revocation, please select the user in the list and click Remove button.