Determining Password Expiration Date (msDS-UserPasswordExpiryTimeComputed)
PowerShell script to get a simple list of all user accounts and see when their password was going to expire
http://msdn.microsoft.com/en-us/library/ms679430(v=vs.85).aspx
Pwd-Last-Set attribute
The date and time that the password for this account was last changed. This value is stored as a large integer that represents the number of 100 nanosecond intervals since January 1, 1601 (UTC). If this value...