We have had MS Exchange 2010 in house for years and all of asudden today it stops resolving/working externally out with the LAN. Within th eLAN it will resolve even to its external DNS name.
HAve seen a few events for Event ID 108 for OWA, but this has not lead me to any fix. Starnge thing is plenty of events saying OWA working as well!
A few Updates were installed last night but nothing for Exchange.
Remote connectivity test showing a problem with Autodiscover but I dodnt recall us ever having an external autodiscover DNS entry.
HTTPS/SSL 443 passing ok as per the microsoft Remote Connectivity tool, also certifacte is ok also for another year.
Any assistance appreciated.