[Samba] multiple passdb backends for standalone fileserver?

[Matthias Leopold]

Hi,

i (naively) would like to have local AND ldap users (and groups...) on 
my standalone fileserver (security = user). "passdb backend = ldapsam" 
already works OK and i found some old posts on the internet about 
"chaining" passdb backends. so i tried "chaining" ldapsam and tdbsam, 
but although testparm doesn't complain and i can add local users with 
"pdbedit -b tdbsam" this setup doesn't actually work (ldap users are 
found, local are not)

is this supposed to work? are there other ways to achieve this?

samba version: 4.7.1 (on CentOS)

thx
matthias