Impact of Implementing Antivirus Protection in a MicrosoftExchange Server2007 Environment (20,000 Users, 1GB Mbx)
Source: Hewlett-Packard (HP)
Based on the results of this extensive lab testing, HP recommends including antivirus protection in every Microsoft Exchange Server 2007 messaging solution to prevent potential damage from virus attacks. With antivirus protection, the CPU cycles did increase, but not enough to impact the user experience. The benefits far outweigh the risks. For the most impact and effectiveness against viruses, install antivirus software on both the Exchange server and Exchange Hub server. Background scanning is important, but should be reserved for off-peak periods to avoid affecting production environments.