When I try to add a NAS server in Unisphere, I get the following error:

Execution Errors:

The specified CIFS server could not be joined to domain.

(Error Code:0x6702173)

07-12-2017    09:27:40    Kernel.Warning    131.199.21.40    Jul 12 14:27:40 _spa Kittyhawk_safe[18107]: "2017-07-12T14:27:40.284Z" " _spa" "Kittyhawk_safe" "18107" "unix/spa/root" "WARN" "13:10380008" :: "For the NAS server in the domain , the DC has the following error: compname DC= Step='Logon IPC$' get Kerberos credential failed, gssError=Miscellaneous failure. Local host name could not be determined. . compname DC= Step='Open NETLOGON Secure Channel' 'NETLOGON' 'DC connected:Server not joined'. " :: Category=Audit Component=DART_SMB

Hostnames and domain redacted..

Any ideas? Even when I stage (pre-create) the account in AD, I can't do the join (ruling out OU rights). I've checked DNS - forward and reverse lookups via NSLOOKUP are good -  and NTP - UTC time jives..

Thanks in advance -

Chris