NTP servers, also known as time servers are typically a critical part of configuration of your Brickstor. Several aspects of the system are time-sensitive, for example system logs, or ability to connect to Active Directory domain. AD in particular, which uses Kerberos internally is quite strict about time synchronization, and should the system time not agree with Domain Controllers, system will not be able to participate in Active Directory.
By default system is configured with public NTP servers, which are expected to be accessible from all systems able to connect to the internet. It may not be possible in your environment, or may not be allowed, etc. If that is the case expectation is that there are internal NTP servers which could be used for this instead of public ones.
If you are joining this system to Active Directory, please make sure that you are synchronizing against same clock as the Active Directory servers. In many cases AD servers already run NTP (server) service, in which case you may prefer to synchronize against them directly. This effectively guarantees that the clock will match that of your domain controllers, even if they are not exactly in sync with the rest of the world.
We recommend having more than a single NTP server configured, but in small environments this may not be possible/practical. In this guide we will assume two private NTP servers 10.255.0.10 and 10.255.0.20.
Removing previously configured domain controllers is necessary if you are setting private NTP servers, or are using a different set of public ones. The process is simple and assumes in this case that system is brand new and never configured before. It is possible that the system has been modified previously and configuration may not match exactly. That should have no influence on the process however.
To remove, obtain a list of all domain controllers configured and then remove them as in this example
To add servers, without any particular order, you need to follow this example, where we add 10.255.0.10 and 10.255.0.20
To observe change in configuration simply issue this command to show latest configuration