This script converts 12:00AM for the current day to the NT Epoch version and then pulls a list of users who have set their password since midnight.
$startOfNTTime = Get-Date 1/1/1601; $currentTime = Get-Date; #UTC Offset $offSet = 4; $midNightTimeStamp = ($currentTime.Date.AddHours($offSet) - $startOfNTTime).ticks; (Get-ADUser -Filter { pwdLastSet -ge $midNightTimeStamp } -properties pwdLastSet).SamAccountName;