The below is some of my favorite and recommended articles thought of sharing them and I recommend sparing some time on reading them:

· File-Level Antivirus Scanning on Exchange 2007 http://technet.microsoft.com/en-us/library/bb332342(EXCHG.80).aspx

· How to Align Exchange I/O with Storage Track Boundaries http://technet.microsoft.com/en-us/library/aa998219(EXCHG.80).aspx

· Forefront Security for Exchange Server Best Practices http://www.microsoft.com/technet/forefront/serversecurity/exchange/Best_Practices/dd1c9914-6073-404a-b71c-86aebacb4cfa.mspx?mfr=true

· UM PBX Configuration Notes http://www.microsoft.com/technet/prodtechnol/exchange/pbx-partners.mspx

· Guidelines for installing and for uninstalling Forefront Security for Exchange Server on an Exchange 2007 standby continuous replication (SCR) http://support.microsoft.com/kb/943616

· Network Load Balancing Integration Concepts for Microsoft Internet Security and Acceleration (ISA) Server 2006 http://www.microsoft.com/technet/isa/2006/nlb.mspx

· Publishing Exchange Server 2007 with ISA Server 2006 http://www.microsoft.com/technet/isa/2006/deployment/exchange.mspx

· Configuration options for WLBS hosts connected to layer 2 switches http://support.microsoft.com/Default.aspx?kbid=193602

· Unicast NLB nodes cannot communicate over an NLB-enabled network adaptor in Windows Server 2003 http://support.microsoft.com/default.aspx/kb/898867

Will share other links later…