The Do not allow manual configuration of iSNS servers machine setting should be configured correctly. 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) KEY: HKLM\Software\Policies\Microsoft\Windows\iSCSI\ConfigureiSNSServers