Hi all, Following this guide?https://wiki.samba.org/index.php/Samba_AD_DC_HOWTO After installing samba4 stable version on a debian64 with no issues, I encounter this issue running samba-tool domain provision: ERROR(runtime): uncaught exception - (16, 'Unknown error') ? File "bin/python/samba/netcmd/__init__.py", line 175, in _run ? ? return self.run(*args, **kwargs) ? File "bin/python/samba/netcmd/domain.py", line 398, in run ? ? use_rfc2307=use_rfc2307, skip_sysvolacl=False) ? File "bin/python/samba/provision/__init__.py", line 2145, in provision ? ? skip_sysvolacl=skip_sysvolacl) ? File "bin/python/samba/provision/__init__.py", line 1788, in provision_fill ? ? targetdir=targetdir, site=DEFAULTSITE) ? File "bin/python/samba/provision/sambadns.py", line 1067, in setup_ad_dns ? ? domainguid, names.ntdsguid, dnsadmins_sid) ? File "bin/python/samba/provision/sambadns.py", line 971, in fill_dns_data_partitions ? ? dnsdomain, hostname, hostip, hostip6) ? File "bin/python/samba/provision/sambadns.py", line 487, in add_dc_domain_records ? ? hostip, hostip6) ? File "bin/python/samba/provision/sambadns.py", line 381, in add_at_record ? ? at_records.append(ndr_pack(at_aaaa_record)) ? File "bin/python/samba/ndr.py", line 33, in ndr_pack ? ? return ndr_pack() Full command is /opt/samba-v4-0-stable/bin/samba-tool domain provision --domain=mydomain --realm=internet.mydomain.it --adminpass=mypassword --host-ip6=mymachine_ip --use-ntvfs Already tried to delete /usr/local/samba/etc/smb.conf Am I missing something? Thanks, Marco Bonato C.S. Dept. - University of Verona - IT +39 045 8027085