#SearchForAllusers.ps1
[ADSISearcher]$searcher="(&(objectcategory=person)(objectclass=user))"

#enable paged searching
$searcher.pagesize=50
$users=$searcher.FindAll()

#display the number of users
Write-Host "There are $($users.count) users in this domain." -foregroundcolor cyan
#display each user's distinguishedname
foreach ($user in $users) {
 Write-Host $user.properties.distinguishedname -foregroundcolor green
}