Hi Alexander,

>What would I need to do on the IPA client for it to prefer IPv6?  I am
>aware I could remove IPv4 address from DNS, but that would break any
>communication from IPv4 only systems.  Any assistance would be appreaciated.
Check that SSSD-generated kdcinfo has IPv6 only addresses in
/var/lib/sss/pubconf/. If not, you need to set

lookup_family_order = ipv6_only

in the domain section in sssd.conf (it defaults to ipv4_first) and
restart sssd.
Thank you a lot. This suggestion did the trick and now working nicely.