We have an Exchange 2010 server, and we have encountered a problem when users that have office 2007 and they try to turn on Out of Office assistant. Outlook returns the message" Your Out of Office settings cannot be displayed, because the server is currently unavailiable. Try again later." From what we have read so far, the problem likely lies in the autodiscover service. When we performed the Test Email Autoconfiguration from an outlook client, it fails we look at the logs, it shows our external url, not our internal url. Any gui interface we have looked at so far distinctly reflects the correct internal and external urls to the mail server. What we need to know is how (likely in powershell) we can force the autodiscover service to pass the correct internal url, instead of the external mail url?