Last week I’ve been on a Forefront Training at Microsoft. For the guys/girls that don’t know Forefront : Check out the ForeFront Website or the ForeFront Team Blog, there’s a lot of information available there!
One of the good things about Forefront is that it runs several Scan Engines at once so there’s always an engine running that detects the virus/mallware/etc.
At the Forefront blog an updated comparison of the Single-AV engines vs. the multi-engine approach by Forefront Security for Exchange Server and Forefront Security for SharePoint is shown. The tests were run over the summer, by AV-Test.org, and show the considerable difference in performance.