Password Expiration Notifier

As a Windows administrator, the problem with users usually results in the fact that they haven’t changed their passwords or have ignored the warnings. But if you have something like Password Expiration Notifier, it scans the Active Directory and for the user accounts that are about to expire their passwords within a certain amount of days, then it helps you as an administrator to actually be more proactive.
This tool can also email account owners. The reason why you would do this, is because sometimes certain users only use their accounts for email.