From the manual: If the format is anything other than domain[NAME] or domain\user, NFSauthentication is used.  NFS authentication uses local files, LDAP, NIS, or local files with LDAP or NIS.  
I made a file system with SMB. To use FTP ID: "User Account[NAME] Server IP" I heard that this is how you can access FTP. I want ID: "User Account" I'd like to do this, is there any other way? Do not use AD.
SMB File System FTP Account Related Questions