I have a fairly generic default installation of SBS 2008 and Exchange 2007. I only recieve this error outside the network. I have an (A) Record pointing "remote" to my ISP static IP. and an MX record of "@ remote.mydomain.com". I'm under the impression from what I've read that this error has to do with an Autodiscover (A) record needing to be added do to it's relationship to Offline Address Book (OAB). Does this look familiar to anyone? And what additions do I need to make to Exchange and DNS settings? My mail gets delivered no problem but I would like to get rid of the error message.