Get Mailbox Exchange

Add-PSSnapin Microsoft.Exchange.Management.PowerShell.SnapIn; 

$AD_User= get-aduser -filter * -Properties * |? DistinguishedName -like "*OU=[domain]*"|? msExchRecipientTypeDetails -like "1" |Select-Object samaccountname, UserPrincipalName  

foreach ($AD_Benutzer in $ad_user)
{
write-host $AD_Benutzer.UserPrincipalName >> c:\temp\Exchange-Rechte.txt
$rechte=Get-MailboxPermission ($AD_Benutzer.samaccountname) | ? user -NotLike "lo\ex*" | ? user -NotLike "[domain]\admin*" | ? user -NotLike "[domain]\orga*" | ? user -NotLike "[domain]\dom*"`  
| ? user -NotLike "[domain]\public*"|  ? user -NotLike "[domain]\delegated*" | ? user -NotLike "[domain]\manage*" |? user -NotLike "nt-aut*" |ft -AutoSize  
if($rechte.length -eq 0)
{write-host "kein weiterer Zugriff" >> c:\temp\Exchange-Rechte.txt }  
else
{
$rechte >> c:\temp\Exchange-Rechte.txt
}
write-host "" >> c:\temp\Exchange-Rechte.txt  
}