A Domain setting can have the default value. In this case the actual setting value is taken from the server-wide Default Domain Settings. You can modify these Default values by clicking the Domain Defaults link on the Domains (Domain List) page.
The Default Domain Settings page resembles a regular Domain Settings page.
A Dynamic Cluster installation maintains separate server-wide Default Domain settings for all non-Shared (Local) Domains, and cluster-wide Default Domain settings for all Shared Domains. In the Cluster environment, the Default Domain Settings page displays links that allow you to switch between the Server-wide and Cluster-wide Default Settings.