I'm looking for something like this (I've searched moodle forums for hours with no luck)
1) user enrol itself to a course, but their initial state is "disabled" (he can't still make use of the course)
2a) opcionally (when the user register), an email is sent to the teacher of the course with links to "enable" the user
2b) the teacher inspect the list of enroled users of his course and he can toggle enabled/disabled
3) when "enabled", the system send a email to the user telling that now, he can make use of the course.
for what I see, this cannot be done actually, but maybe someone know a workaround (or maybe I'm wrong and it can be done)
ps: I'm sure there are better words than enable/disable for this...