This small piece of code helps you to know when a active directory user has changed his password last time. Use your own inventions to make the output appear the way you want.
$user = “user1”
$changedtime = [datetime]::fromfiletime($results.properties.pwdlastset)
write-host -b blue -f red The user, $user has changed password last time at $changedtime
It will be more easy if you have Quest PowerShell Cmdlets for active roles installed in your PC. Download it from Quest site and install on your machine and execute the below oneliner in Quest powershell window.
Get-QADUser user1 | ft displayname, PasswordLastSet