Nice article by Ben Ari on an unusual problem where forwarding fails to be enabled on the UAG DirectAccess server’s 6to4 interface.
You’ll see this error from time to time after you rebuild a UAG DirectAccess server and then try to restore the configuration from backup.
For the details of the problem and a fix, check out Ben’s article on the UAG Team Blog over at:
DEBRA LITTLEJOHN SHINDER
MVP (Enterprise Security)