From the Address Manager user interface you can enable NTP service and add IP addresses for a hierarchy of NTP servers.
Network time protocol (NTP) service is essential to some of the more complex DNS/DHCP Server and Address Manager functions, such as xHA and DHCP failover, and differential deployment. A specific external time reference is also essential to some organizations for reports and compliance tracking. The NTP services on DNS/DHCP Server act as both a source of NTP synchronization for clients and as clients themselves to another NTP service that synchronizes the clock reference they provide.
To configure NTP on a DNS/DHCP Server appliance: