You have to list them and use commas to separate them. Otherwise it will automatically pick the nearest domain controller. Here is the exact wording from the user guide:
Domain Controller Hosts (Optional)
IP address (10.98.87.67) or FQDN (dc01.corp.example.com). You can also provide the virtual IP address of a load balancer that is used as the front-end server of the domain controller. This option provides High Availability (HA) capability for connections to ActiveDirectory.
You can add multiple domain controller hosts; use commas to separate the names of the hosts.