Following command is used to set users
password to never expire.
/usr/lbin/modprpw -l -m mintm=0,exptm=0,expwarn=0,lftm=0 ABCD
/usr/lbin/getprpw ABCD
uid=192, bootpw=NO, audid=458, audflg=1, mintm=0, maxpwln=-1, exptm=0, lftm=0, spwchg=Sun Dec 3 02:36:53 2006, upwchg=-1, acctexp=-1, llog=-1, expwarn=0, usrpick=DFT, syspnpw=DFT, rstrpw=DFT, nullpw=DFT, admnum=-1, syschpw=DFT, sysltpw=DFT, timeod=-1, slogint=Sun Dec 3 02:59:41 2006, ulogint=-1, sloginy=tty, culogin=-1, uloginy=-1, umaxlntr=-1, alock=NO, lockout=0000000
ABCD is the user account.
/usr/lbin/modprpw -l -m mintm=0,exptm=0,expwarn=0,lftm=0 ABCD
/usr/lbin/getprpw ABCD
uid=192, bootpw=NO, audid=458, audflg=1, mintm=0, maxpwln=-1, exptm=0, lftm=0, spwchg=Sun Dec 3 02:36:53 2006, upwchg=-1, acctexp=-1, llog=-1, expwarn=0, usrpick=DFT, syspnpw=DFT, rstrpw=DFT, nullpw=DFT, admnum=-1, syschpw=DFT, sysltpw=DFT, timeod=-1, slogint=Sun Dec 3 02:59:41 2006, ulogint=-1, sloginy=tty, culogin=-1, uloginy=-1, umaxlntr=-1, alock=NO, lockout=0000000
ABCD is the user account.