Preferred domain controllers are used when requesting resources from Active Directory. Normally, Active Directory assigns the closest domain controller. Use this feature to specify a preferred domain controller when a domain controller has not already been specified.
Note: Preferred domain controllers retrieve objects from Active Directory, such as a list of domain controller or a list of users. If all domain controllers in the domain are required to be scanned, such as the Inactive Accounts feature, the preferred domain controllers are not used.
To add preferred domain controllers
Click OK.

The preferred domain controllers list:
