I've been trying to perform a token substitution in the Subject line on an
email notification template. All I'm getting in the email is the literal
$UserFullName$ and not the substitution value. I am getting proper
substitution in the message text.

Am I missing something or is this feature not available?

P.S. I know I can build the subject with a do-send-email action.

Dave Braun
Ameren Services