#ChangeACL.ps1
$Right="FullControl"
$StartingDir=Read-Host "C:testusers.csv"
$Principal=Read-Host "Full Control" `
"$Right to? `n U contosotest"

$rule=new-object System.Security.AccessControl.FileSystemAccessRule
($Principal,$Right,"Allow")

foreach ($file in $(Get-ChildItem $StartingDir -recurse)) {
  $acl=get-acl $file.FullName

  #Add this access rule to the ACL
  $acl.SetAccessRule($rule)

  #Write the changes to the object
  set-acl $File.Fullname $acl
  }