Directory Mask not working

Hello together,

I have the problem that the mask for creating directories is not applied to all users. The problem does not occur when creating files. Below is a minimal example with two users, where the mask is ignored for the folder "folder_created_by_isa" created by the user "isa". I followed the guide from gderf (samba-cifs-file-and-directory-creation-permissions).

Unfortunately I don't know any more, maybe someone of you has an idea, if at another place the rights could be overwritten

Best regards,

Stefan

ls -al
drwxrwx---+  4 root   users 4096 Sep 22 21:35 .
drwxrwx---+ 23 root   users 4096 Sep 22 20:45 ..
-rwxrwxr--+  1 isa    users  220 Sep 22 21:34 file_created_by_isa.rtf
-rwxrwx---+  1 stefan users    0 Sep 22 21:35 file_created_by_stefan.rtf
drwxr-xr-x+  2 isa    users 4096 Sep 22 21:33 folder_created_by_isa
drwxrws---+  2 stefan users 4096 Sep 22 21:34 folder_created_by_stefan

Share Extra options

create mask = 0770
directory mask = 2770
force create mode = 0770
force directory mode = 2770

Share Configuration

Solved by following cifs/samba global extra options (client was OS X):

obey pam restrictions = no
unix extensions = no

vfs objects = fruit streams_xattr  
fruit:metadata = stream
fruit:model = MacSamba
fruit:posix_rename = yes 
fruit:veto_appledouble = no
fruit:nfs_aces = no
fruit:wipe_intentionally_left_blank_rfork = yes 
fruit:delete_empty_adfiles = yes