Thanks for getting in touch Marco, Seems it was a config issue on the device itself.  The hostname wasnt stipulated on inital setup.  Thanks anyway. 
Hi All,   Hoping to get some help on this one.  DNS settings are correct and authentication and directory services have been configured, but for some reason i cant resolve any DNS names from the appliance.  Version 3.9.0 (Build 55) Regards
Only able to add systems via IP and not DNS names