Sorry for the previous message, it was just an issue with the setting of the primary dns resolver on the linux client. So I can confirm msktutil 0.5-1 (Debian GNU/Linux jessie) works fine with samba-4.1.2 (creates principal and spn on PDC and exports them in a keytab to client -- that is very handy with tools like puppet where a single line command is very prized) regards, Francesco