With the following share defined: [share1] path = /srv/share1 browseable = yes read only = no guest ok = no inherit permissions = yes I create a root directory: mkdir inherit && chown 2770 inherit I connect to the server with a Windows client and create a text file and a folder under that directory. Here is what happens: ├── [drwxrws---] ./inherit │ ├── [-rwxr-----] ./inherit/New text document.txt │ └── [drwxrws---] ./inherit/New folder According to the man page: New files inherit their read/write bits from the parent directory. In this case the containing folder group write permission has not been inherited. The inheritance worked as expected in 4.1.6.