Today, the Forefront Threat Management Gateway (TMG) 2010 documentation became available on TechNet.

Besides the regular topics, like configuring TMG as a secure gateway between your network and the internet, the documentation also focuses on new functionality like HTTPS inspection, Anti-malware, Network Inspection (NIS), Enhanced NAT, VOIP support, 64-bit support and interoperability between TMG and BranchCache (new functionality in Windows 7 and Windows Server 2008 r2).

The documentation also contains steps on how to plan to, prepare for and configure ForeFront TMG in relationship with Exchange Edge Servers, i.e. E-Mail Protection as well as steps on how to upgrade from previous products like ISA Server to ForeFront TMG here.

You can find the ForeFront TMG 2010 documentation here.