This is the name of the configuration file used to read and write the Policy Manager's permanent database records; if left as an empty string, the module falls back to the default name '@file://PMModule.cfg'. Admins set this when they want PM configuration persisted to a custom file name rather than the built-in default. Setting usrPmCfgFileName to '@file://custom_pm.cfg' directs the Policy Manager to use that file for its saved configuration instead of the default.