[Kazun]

Код:

$date = (Get-Date).AddYears(-1)
Get-ADUser -Filter 'whenChanged -gt $date' -Prop whenChanged | Select Name,whenChanged

В Cmd можно использовать dsquery:

Код:

dsquery * -filter "(&(objectCategory=person)(objectClass=user)(whenChanged>=20150904000000.0Z)) -attr name whenChanged