Get Modified users in AD using Powershell and C#

Using c# within powershell you can easily get users that have changed in AD. Just change the date found in the whenChanged part of the query (20090601):

$strFilter = "(&(objectClass=User)(whenChanged>=20090601000000.0Z)(userAccountControl:1.2.840.113556.1.4.803:=2))"

$objDomain = New-Object System.DirectoryServices.DirectoryEntry

$objSearcher = New-Object System.DirectoryServices.DirectorySearcher
$objSearcher.SearchRoot = $objDomain
$objSearcher.PageSize = 1000
$objSearcher.Filter = $strFilter

$colProplist = "name"
foreach ($i in $colPropList){$objSearcher.PropertiesToLoad.Add($i)}

$colResults = $objSearcher.FindAll()

foreach ($objResult in $colResults)
   {$objItem = $objResult.Properties; $objItem.name}

On a side note, you can also do this very easily with the free Quest AD cmdlets