As a general best practice, you should simplify your site topology and site link costs as much as possible if you enable the Try Next Closest Site setting. In enterprises with many hub sites, this can simplify any plans that you make for handling situations in which clients in one site need to fail over to a domain controller in another site.

By default, the Try Next Closest Site setting is not enabled. When the setting is not enabled, DC Locator uses the following algorithm to locate a domain controller:

  • Try to find a domain controller in the same site.
  • If no domain controller is available in the same site, try to find any domain controller in the domain.

How to: