Hi I've had this problem since 3.0.9 an I've now reproduced it on 4.0.6, 4.0.7 git and 4.1.0 pre1 Summary: if I chmod g+s a shared folder, the file created therein are not group owned. Here is the original post from March which didn't get a reply: Version 4.0.5-GIT-9ec44d4 Single DC and fileserver running the samba binary. Hi I have a share called shared: [shared] path = /home/shared read only = No I set the ACL: setfacl -R -m g:staff:rw,d:g:staff:rw /home/shared This is what it looks like: getfacl shared # file: shared # owner: root # group: staff # flags: -s- user::rwx group::rwx group:staff:rw- mask::rwx other::--- default:user::rwx default:group::rwx default:group:staff:rw- default:mask::rwx default:other::--- The file listing looks OK: drwxrws---+ 3 root staff 4096 Mar 29 10:05 shared Problem: Files created from Linux cifs mounted or W7 clients are group 'Domain users', the primary group of the user, not 'staff' as the g+s should give. Files created in the share on the DC are correctly assigned to group 'staff'. Question: How do I get files created in the share 'shared' to be group owned by group 'staff'? Cheers, Steve.