If Prevx was installed on an Exchange server, would it actively scan the Exchange mailbox to disinfect emails before distribution to users? If so & it found a virus, phishing attempt etc, would the virus be disinfected automatically or would the software display a dialog on the server waiting for user interaction?
Prevx currently does not integrate into Exchange so it would probably be best to install Prevx on the endpoint PCs to protect them if they do receive the email and try and open it. Exchange integration is on our roadmap for our Enterprise offering, however, so don't count being able to use this functionality within Prevx out just yet
In fact, if you install any antivirus, etc., product that is not fully Exchange compliant you will need to exclude the Exchange folders (and various other server files and folders) from that product's realtime and on-demand scanners, otherwise you might face all sorts of issues with Exchange and your server.