Open the /etc/sysconfig/network-scripts/ifcfg-ens192 file with the command:
vi /etc/sysconfig/network-scripts/ifcfg-ens192
Make sure that Primary DNS (DNS1) is the Active Directory host IP in that file. The interface name (ens192) may be different on your system, please check the correct interface configuration file accordingly.
Restart the network service with the command:
systemctl restart network
The NTP servers should be changed. Open the chronyd config file with the command:
vi /etc/chrony.conf
Edit the configurations in the config file according to the information below:
server time.google.com iburst
server time2.google.com iburst
server time3.google.com iburst
server time4.google.com iburst