samba - Oct 2005 - Winbind to map all user from active directory to same uid

Have any way for winbind to map  all user from active directory to single 
uid/gid or
map uid/gid to uid that already have on local system(linux)  ?
Is ldap backend  can do that ?

I try to integrate user with maildrop  because maildrop need same global 
uid/gid  for all user ( user that i collect from winbind)


Regard,
nattapon

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