This replaces the CIAM Jira update to the Server Installation and Configuration guide section on cross-site replication

This statement belongs at the beginning of this chapter in the installation guide: https://access.redhat.com/documentation/en-us/red_hat_single_sign-on/7.6/html/server_installation_and_configuration_guide/operating-mode#crossdc-mode

• Cross-site replication, which was introduced as a Technology Preview feature in Red Hat Single Sign-On 7.2, is no longer available as a supported feature in any Red Hat SSO 7.x release including the latest RH-SSO 7.6 release. Red Hat does not recommend any customer implement or use this feature in their environment because it is not supported. Also, support exceptions for this feature are no longer considered or accepted.
  A new solution for cross-site replication is being discussed and tentatively considered for a future release of Red Hat build of Keycloak (RHBK), which is the product that will be introduced instead of Red Hat SSO 8. More details will be available soon.