Hi, As Centos 7 and Fedora defaults to chronyd [2] , should I use ntpd for some reason [3] ? I based my configurations on [1] which use ntpd ... but I thinking change for chronyd , change ntp deamons could outage the samba service and client computers ? Thanks [1] https://negativo17.org/samba-4-active-directory-with-bind-dlz-zones-dynamic-dns-updates-windows-static-rpc-2/ [2] https://fedoraproject.org/wiki/Features/ChronyDefaultNTP https://redhatlinux.guru/2018/04/18/chronyd-replacement-for-ntpd/ [3] https://wiki.samba.org/index.php/Time_Synchronisation#With_chrony -- S?rgio M. B.