Check to use the Microsoft IRM version 1, which is a Microsoft extension to the PDF format to support Microsoft IRM protection. The extension allows PDF documents to be encrypted by Microsoft IRM technology that is implemented by Microsoft's Active Directory Rights Management Server as well as by Azure Active Directory Rights Management Services.
If not defined, Microsoft IRM Protection Version 2(PPDF) is used.
|Registry Hive||HKEY_LOCAL_MACHINE or HKEY_CURRENT_USER|
|Registry Path||Software\Policies\Foxit\Reader 8.0\RMS\Preferences|