How to troubleshoot ISA 2006 Error 64 “The specified network name is no longer available” while accessing a HTTPS site

A couple Microsoft support engineers posted some good info on troubleshooting ISA 2006 Error 64 “The specified network name is no longer available” while accessing a HTTPS site over on the TMG blog. If you run into this issue it's probably worth checking out:

http://blogs.technet.com/b/isablog/archive/2013/05/29/error-64-the-specified-network-name-is-no-longer-available-while-accessing-a-https-site-through-isa-2006.aspx