Hi,
Please try http://docs.sun.com/app/docs/doc/819-0420/6n2rlnnaf?l=zh_TW&a=view
It looks like just edit the /etc/inet/ntp.conf then the NTP is work!
/etc/inet/ntp.conf Example:
--
server <NTP server1> --That you can search in the internet.
server <NTP server2> --That you can search in the internet.
server <NTP server3> --That you can search in the internet.
broadcast 224.0.1.1 ttl 4
enable auth monitor
driftfile /var/ntp/ntp.drift
statsdir /var/ntp/ntpstats/
filegen peerstats file peerstats type day enable
filegen loopstats file loopstats type day enable
filegen clockstats file clockstats type day enable
--
Hope that helpful.