$resfile = New-Item -ItemType file -Path liste_forwards.csv -Force
 
Add-Content -Path $resfile -Value "MailboxDisplayName,MailboxAlias,MailContactDisplayName,MailcontactOrganizationalUnit,MailcontactExternalEmailAddress"
 
 
get-mailbox -ResultSize unlimited | Where-Object { $_.ForwardingAddress -ne $null } | ForEach-Object { 
$forward = Get-Recipient -Identity $_.ForwardingAddress
	if ( $forward.RecipientType -eq "MailContact") {
	$mailc = Get-MailContact -Identity $forward.alias
	Add-Content -Path $resfile -Value "$($_.name),$($_.alias),$($mailc.displayname),$($mailc.OrganizationalUnit),$($mailc.ExternalEmailAddress)"
	}
	else {}
 
}