cls
Add-PSSnapin Microsoft.Exchange.Management.PowerShell.E2010

# E-Mail-Adressen der Mailboxen 
$mailboxes = @(get-mailbox digitaldata) 
# Name des neuen Ordners 
$name_folder = "MailStoreArchiv" 

$ewsdll = "C:\Program Files\Microsoft\Exchange\Web Services\2.0\Microsoft.Exchange.WebServices.dll" 
[void][Reflection.Assembly]::LoadFile($ewsdll) 
$service = New-Object Microsoft.Exchange.WebServices.Data.ExchangeService([Microsoft.Exchange.WebServices.Data.ExchangeVersion]::Exchange2010_SP2) 
$windowsIdentity = [System.Security.Principal.WindowsIdentity]::GetCurrent() 
$sid = "LDAP://<SID=" + $windowsIdentity.user.Value.ToString() + ">" 
$adminuser = [ADSI]$sid 
$service.AutodiscoverUrl($adminuser.mail.ToString(), "https://appel-com01.appel-gmbh.local/Autodiscover/Autodiscover.xml") 


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) 

} #end foreach