It is not safe to have only one CA server in topology. Therefore there is a check and in case that there is only one CA server a warning is shown. The warning is shown after each refreshing of servers facet. https://fedorahosted.org/freeipa/ticket/5828 Reviewed-By: Tomas Krizek <tkrizek@redhat.com>
http://www.freeipa.org/page/UI_Unit_Tests