Hi Geeks,
My friend called me for help, I checked his server and ran netstat
netstat showed 1 IP address connected to Exchange edge transport server and System's (PID). Now if he blocks (inbound) that IP address on windows firewall, complete access of his exchange goes down. No incoming/outgoing mail, no OWA accesss to. OWA inaccessible even on exchange server itself. Other things work ok.
Please help what is going on?