$list = "jacques.martin","Groupe-Ecole_des_Fans"
foreach ($user in $list){
$folder = "\SRV001i$chansons.txt"
$acl = Get-Acl -Path $folder
$ar = New-Object system.security.accesscontrol.filesystemaccessrule($user,"FullControl","Allow")
$acl.SetAccessRule($ar)
Set-Acl -Path $folder $acl
}