Question : POPCON for exchange downloads hang with Trend Micro Worry free advanced mail scanner

Hi Experts,
I have a Small Business Server 2003 with POPCON as my mail downloader and then sends to exchange to distribute. I have Trend Micro Worry Free advanced installed on the server. Every couple of days the POPCON downloaded just hangs and i need to restart before it downloads again. After removing Trend Micro Messaging Scanner it is resolved. Why does this happen? I have excluded POPCONs folder from scanning. This also occurs at another site with an identical setup
1. Why does it hang? i have contacted popcon and they said to exclude popcon's folder from virus scanning
2.Do i really need the Trend scanner on the exchange itself as i know trend provides a pop3 scanner on each client to scan mails anyway and isp's scan the mails for virusses? i only have 10 users? so why have another mail scanner on the server?

Answer : POPCON for exchange downloads hang with Trend Micro Worry free advanced mail scanner

Only if you can be 100% sure no Admin surfs the web while logged into the Server and also 100% sure no client without virus scanner active and updated will EVER connect to your Exchange as a client. Think about temp workers, CEOs who might want to access Exchange via VPN from their home computer, etc.
But yes, if you can be sure about that then the exchange virus protection doesn't add any value really.