man sssd-ipa:

       dyndns_update (boolean)
...

           NOTE: While it is still possible to use the old ipa_dyndns_update option, users should migrate to using dyndns_update in their config file.

           Default: false

The change was introduced in this SSSD commit.

The sssd option dyndns_update was introduced in sssd-1.10 and old option ipa_dyndns_update was deprecated in sssd-1.12.

FreeIPA 3.3.0 requires sssd >= 1.11.0-0.1.beta2 and FreeIPA 4.1.0 requires sssd >= 1.12.

It would be good to fix this ticket in 4.1 because it confuses freeipa users and sssd log fail contains unnecessary minor failure message.

master:

• e29f928 Use dyndns_update instead of deprecated sssd option

ipa-4-1:

• 031bdca Use dyndns_update instead of deprecated sssd option