I have a server running Exchange 2007 on Windows 2003. Lately we have noticed a lot of traffic being generated by port 1144 from the exchange server to other PC's. Running netstat on the server it seems this is being generated by MSExchangeIS.
TCP SERVERNAME:1144 PCNAME.???.co.uk:1966 ESTABLISHED
TCP SERVERNAME:1144 PCNAME.???.co.uk:2623 ESTABLISHED
Is this normal activity.