Add causal_clustering.load_balancing.config.server_policies to the ref page (neo4j#2459)

Based on the PR neo4j#2414

Author: NataliaIvakina

modules/ROOT/pages/configuration/configuration-settings.adoc

@@ -6,11 +6,38 @@
 :page-styles: hide-table-captions
 
 This page provides a complete reference to the Neo4j configuration settings, which can be set in xref::/configuration/file-locations.adoc[_neo4j.conf_].
-Refer to xref::/configuration/neo4j-conf.adoc[The neo4j.conf file] for details on how to use configuration settings.
+Refer to xref::/configuration/neo4j-conf.adoc[The _neo4j.conf_ file] for details on how to use configuration settings.
 
 Some of the settings are labeled **_Dynamic_**, which means that they can be changed at runtime, without restarting the service.
 For more information on how to update dynamic configuration settings, see xref:configuration/dynamic-settings.adoc[Update dynamic settings].
 
+[role=label--enterprise]
+== Configuration setting group for the load balancing framework
+
+When deploying a multi-data cluster in Neo4j, you can configure the load balancing framework.
+
+In Neo4j, the load balancing system is based on a plugin architecture.
+The primary built-in plugin is `server_policies`, which is set up by the following property:
+
+[source, shell]
+----
+causal_clustering.load_balancing.plugin=server_policies
+----
+
+`server_policies` plugin determines which servers are eligible to serve client requests based on predefined routing policies.
+If a client does not specify a routing policy, the system defaults to using all available servers.
+
+You can define routing policies by using the following property format:
+
+[source, shell]
+----
+causal_clustering.load_balancing.config.server_policies.<policy-name>=<policy-definition>
+----
+
+Where `<policy-name>` is the name of the routing policy, and `<policy-definition>` specifies the server selection logic.
+
+See xref:clustering-advanced/multi-data-center/load-balancing.adoc#multi-dc-load-balancing-the-load-balancing-framework[Appendix -> Advanced Causal Clustering -> Multi-data center load balancing] for more details.
+
 
 == Checkpoint settings