@Reinhard , I have also experienced same issue as you commented. After downloading the samba version from 4.3.9 to 4.1.6, I can again access to Ubuntu 14.04 samba server from windows 7.
@Reinhard , I have also experienced same issue as you commented. After downloading the samba version from 4.3.9 to 4.1.6, I can again access to Ubuntu 14.04 samba server from windows 7.