Inactive Users Tracker (Freeware and Commercial)
Many corporate security policies require that Active Directory user accounts must be disabled after certain period of inactivity. This is a good practice; doing so keeps Active Directory secure and clean. For example, someone can create a user account, leave it untouched for many days, and then use it to perform malicious activity against an organization. Another example is employee retirement: User accounts are usually disabled when an employee quits an organization. Most HR databases only keep information about "primary" user account, but what if a user had additional user accounts?
Inactive Users Tracker (Freeware and Commercial) - NetWrix Corporation