Exchange: Ordner für ausgewählte User erstellen

# E-Mail-Adressen der Mailboxen
$mailboxes = @("maxmustermann@domain.de","henriettemuster@domain.de")  

# Name des neuen Ordners
$name_folder = "MeinKalender"  

$ewsdll = "C:\Program Files\Microsoft\Exchange\Web Services\1.0\Microsoft.Exchange.WebServices.dll"  
[void][Reflection.Assembly]::LoadFile($ewsdll)
$service = New-Object Microsoft.Exchange.WebServices.Data.ExchangeService([Microsoft.Exchange.WebServices.Data.ExchangeVersion]::Exchange2010)
$windowsIdentity = [System.Security.Principal.WindowsIdentity]::GetCurrent()
$sid = "LDAP://<SID=" + $windowsIdentity.user.Value.ToString() + ">"  
$adminuser = [ADSI]$sid
$service.AutodiscoverUrl($adminuser.mail.ToString())

foreach($mailbox in $mailboxes){
	$parentfolderid = new-object  Microsoft.Exchange.WebServices.Data.FolderId([Microsoft.Exchange.WebServices.Data.WellKnownFolderName]::MsgFolderRoot, $mailbox)
	[Microsoft.Exchange.WebServices.Data.Folder]::Bind($service, $parentfolderid) | out-null
	$NewFolder = new-object Microsoft.Exchange.WebServices.Data.CalendarFolder($service)
	$NewFolder.DisplayName = $name_folder
	$NewFolder.Save($parentfolderid)
}