Found some issues with link URLs & gathering in this Jira. In general, ensure underscores instead of hyphens, en-us instead of /en/ and html-single instead of single:

INTEGRATION WITH THE MESSAGING-ACTIVEMQ SUBSYSTEM

You can use the elytron subsystem to secure the messaging-activemq subsystem. You can find more information on using the elytron subsystem and creating and Elytron security domains in the Elytron Subsystem section. <= link for Elytron Subsystem should be https://access.redhat.com/documentation/en-us/red_hat_jboss_enterprise_application_platform/7.1.beta/html-single/how_to_configure_identity_management/#elytron_secure_apps

TRACK AND VIEW CONFIGURATION CHANGES FROM THE MANAGEMENT CLI

In a managed domain, configuration changes are tracked at the host level for host and server-related modifications. Enabling configuration changes for a host controller enables it for all of its managed servers. Configuring tracking configuration changes has been moved to the new core-management subsystem. For more information see View Configuration Changes. <= View Configuration Changes URL should be https://access.redhat.com/documentation/en-us/red_hat_jboss_enterprise_application_platform/7.1.beta/html-single/configuration_guide/#view_config_changes