If enabled then new iSNS servers may not be added and thus new targets discovered via those iSNS servers; existing iSNS servers may not be removed. If disabled then new iSNS servers may be added and thus new targets discovered via those iSNS servers; existing iSNS servers may be removed. Fix: (1) GPO: Computer Configuration\Administrative Templates\System\iSCSI\iSCSI Target Discovery!Do not allow manual configuration of iSNS servers (2) REG: HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\iSCSI!ConfigureiSNSServers