Hier eine überarbeitete Version des Skripts:

#Hostname für Exchange Webservices, OWA, Outlook Anywhere, Active Sync:
$OutlookHostname = "mail.maildomain.de"
 
#Hostname für Autodiscover:
$AutodiscoverHostname = "autodiscover.maildomain.de"
 
 
 
#OWA
$owa = "https://" + "$OutlookHostname" + "/owa"
write-host "OWA URL:" $owa
Get-OwaVirtualDirectory -Server $env:computername | Set-OwaVirtualDirectory -internalurl $owa -externalurl $owa -wa 0
 
#ECP
$ecp = "https://" + "$OutlookHostname" + "/ecp"
write-host "ECP URL:" $ecp
Get-EcpVirtualDirectory -server $env:computername| Set-EcpVirtualDirectory -internalurl $ecp -externalurl $ecp
 
#EWS
$ews = "https://" + "$OutlookHostname" + "/EWS/Exchange.asmx"
write-host "EWS URL:" $ews
Get-WebServicesVirtualDirectory -server $env:computername | Set-WebServicesVirtualDirectory -internalurl $ews -externalurl $ews -confirm:$false -force
 
#ActiveSync
$eas = "https://" + "$OutlookHostname" + "/Microsoft-Server-ActiveSync"
write-host "ActiveSync URL:" $eas
Get-ActiveSyncVirtualDirectory -Server $env:computername  | Set-ActiveSyncVirtualDirectory -internalurl $eas -externalurl $eas
 
#OfflineAdressbuch
$oab = "https://" + "$OutlookHostname" + "/OAB"
write-host "OAB URL:" $oab
Get-OabVirtualDirectory -Server $env:computername | Set-OabVirtualDirectory -internalurl $oab -externalurl $oab
 
#Outlook Anywhere (RPCoverhTTP)
write-host "OA Hostname:" $OutlookHostname
Get-OutlookAnywhere -Server $env:computername | Set-OutlookAnywhere -externalhostname $OutlookHostname
 
#Autodiscover SCP ### NICHT BEI FRONTENDSERVERN !!!
$autodiscover = "https://" + "$AutodiscoverHostname" + "/Autodiscover/Autodiscover.xml"
write-host "Autodiscover URL:" $autodiscover
Get-AutodiscoverVirtualDirectory -server $env:computername | Set-AutodiscoverVirtualDirectory -InternalUrl $autodiscover
Get-ClientAccessServer -Identity $env:computername | Set-ClientAccessServer -AutoDiscoverServiceInternalUri $autodiscover