The ForeFront Server Protection team is very active and just released an updated of their capacity planning guide for Forefront Protection 2010 for Exchange Server (FPE). This guide is a hardware design document for FPE, advising on the number of CPU cores, memory requirements and utilization and throughput tresholds. It also contains performance guidelines are also given for Exchange 2010 deployments; an interactive tool – like the one for ForeFront Security for Exchange Server v10 SP1 (FSE10SP1) – is announced for the future. Goal of the document document is to perform an indication of the impact on the Exchange environment. You can view the FPE2010 capacity planning guide here.