ipa-client-install: Publish CA certificate to systemwide store
During the installation, copy the CA certificate to the systemwide
store (/etc/pki/ca-trust/source/anchors/ipa-ca.crt) and update the
systemwide CA database.
This allows browsers to access IPA WebUI without warning out of the
box.
https://fedorahosted.org/freeipa/ticket/3504