If you are using NIS + or the /etc files to store user account information, you can set up password aging on a user's password. Starting in the Solaris 9 12/02 release, password aging is also supported in the LDAP directory service.
Password aging enables you to force users to change their passwords periodically or to prevent a user from changing a password before a specified interval. If you want to prevent an intruder from gaining undetected access to the system by using an old and inactive account, you can also set a password expiration date when the account becomes disabled. You can set password aging attributes with the passwd command or the Solaris Management Console's Users tool.
For information about starting the Solaris Management Console, see How to Start the Console as Superuser or as a Role.