The Entrust PKI Hub installation configures chrony to use the NTP server provided by DHCP. 

In multi-node installations, all the nodes must have synchronized dates to prevent communication errors.

To modify this default configuration, edit the chrony configuration file in all the installation nodes. 

/etc/chrony.conf

Do not modify the following lines in any case.

bindcmdaddress 0.0.0.0
cmdallow all

See a reference of the chrony parameters at https://chrony-project.org/doc/4.4/chrony.conf.html