In this video interview David did with Jim explains various things around virtualization with ISA/TMG and there are some topics they discuss (such as virtual ISA failover) which you won’t find in the guide.
In the past, ISA has had very limited or no support on Microsoft's virtualization platform. Now, ISA and Forefront Threat Management Gateway (TMG) is supported . I met up with Jim Harrison to get some guidance on what you need to think about when you virtualize your ISA/TMG servers. We quickly dive into a whiteboard session on the various ways you can configure Hyper-V / virtual server to work with ISA/TMG and dig into the advantages and disadvantages of each network configuration such as[…]