Thanks for the quick response,
i tried to restart manually service samba and samba-ad-dc and all service but the problem has not been solved. I tried to manually update the system with apt-get update , apt-get dist-upgrade and after many system reboot I finally all services actived.Now i backupped the configuration but now I'm afraid to restart the server...
What do you think about the last 4.2 release??If the problem isn't solved at the new restart of the server can i try to install the 4.2 release to solve the problem?
Attached the actived services list