Server: Exchange 2007 IAS will start and then immediately shut down. We have external emails going out but none coming inbound. Here is the Event ID: Event Type: Error Event Source: Service Control Manager Event Category: None Event ID: 7023 Date: 9/20/2010 Time: 10:11:19 AM User: N/A Computer: INDIANSEXCHANGE Description: The Internet Authentication Service service terminated with the following error: The service cannot be started, either because it is disabled or because it has no enabled devices associated with it. For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.

I would ask this in the Windows Serer Forums as this is not an Exchange-specific issue: http://social.technet.microsoft.com/Forums/en/category/windowsserver/ Or SBS forums if this is SBS: http://social.technet.microsoft.com/Forums/en-US/smallbusinessserver/threads