Edit following file and enter the line given below...

# vi /etc/inet/ntp.conf --------------On client machin
server 10.22.17.50 prefer
# svcs -v ntp
# svcadm disable ntp ( For Solaris9: #/etc/init.d/xntpd stop)
# svcadm enable ntp ( For Solaris9: #/etc/init.d/xntpd start)


Whereas 10.22.17.50 is your NTP server.