I love forefront protection for exchange it probably the most successful antispam well if it sized correctly .
to simplify a lot of reading for you its about 64MB per Engine per process( process means the how many emails will you be able to scan at specific time so 2 means two emails at once , or 4 emails at once …etc. ) so if you are using 5 engines you will need 320M to scan a single process + at least 650MB to support the services also double his values if you have two roles installed (HUB, mailbox ) .
- Less memory is required if Intelligent Engine Management (IEM) .
- if you get a lot of emails with large attachments you have to increase this members .
- you should install FPE on all Exchange Servers that you have ( Edge,HUB,Mailbox)
so for server with 4cores scanning using the 5 Engines running 4 process this will need 6G of Ram for best performance scenario but the minimum requirements for FPE are +2G of Ram
you should always use " Forefront Protection 2010 for Exchange Server Capacity Planning Tool " http://www.microsoft.com/downloads/en/details.aspx?FamilyID=2303c87d-f976-4424-a192-24d2af02064d&displaylang=en
so what is the lab environment I am using? its not a big environment but it’s the most common
note; we will not be covering TMG+ Edge in this post as it already covered in Email Protection with Threat Management Gateway
- Network Load Balancer (NLB), there are no special installation procedures for FPE
- You install FPE on LCR and DAG systems just as you would on a standalone system for other cluster types please visit http://technet.microsoft.com/en-us/library/dd639348.aspx
Some information’s about FPE
Microsoft Forefront Protection 2010 for Exchange Server Virus Bulletin test results
Gartner positions Microsoft in the Leaders quadrant