[Samba] Variable expansion and samba 4 AD

[john]

Ive been running a samba3 ntdomain for some time on the home lan , with
samba4 filtering through in debian, i started playing with a Samba 4 AD/DC
got it running in virtualbox, but my running server uses things like
includes based on %L and %u
and also share visibility based on some of these but , ive had no luck
,under samba 4 AD/DC they do not work, or is this a case of debian doing
odd things ?