I tried to add samba users using the option "Convert Users" but this does not work.
Apears this message:
Failed To convert user: /usr/bin/pdbedit failed
new password: retype new password
I using webmin in Ubuntu Server 16.04 LTS and users can be added with command smbpasswd -a from terminal.
This is a Screenshot of the bug.
Last edit: Dante Gonzalez 2016-08-31
Ok, I see the cause of this - in newer Samba versions, the pdbedit command needs a extra flag when webmin calls it. This will be fixed in the next release.