From rhn-support-bmaxwell:

Have you seen any issues with docs less than 6.4 ? they seem to be going to 404
https://access.redhat.com/documentation/en-us/red_hat_jboss_enterprise_application_platform/6.2/
https://access.redhat.com/documentation/en-us/jboss_enterprise_application_platform/6.2/html/getting_started_guide/
It looks like 6.4 is fine, but the other 6.x are not
EAP 5 and 4 , though EoL are 404 as well
EAP 5 https://access.redhat.com/support/policy/updates/jboss_notes/ is still in ELS-2 , so we definitely need to keep those
we could archive the EAP 4 ones I figure
I do not see any layered products that should be using 4, so it should be ok to remove those

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We can delete the 4.x titles from the portal altogether, but the 6.x and 5.x titles should all be showing and not throwing 404s (which they are).