From what I understand, you can modify sssd.conf to make it so the output of `id` or
`getent` has short names. As long as domain resolution order is set (which it sounds like
you do), all you would need to do is modify sssd.conf on all the IPA clients (NOT the IPA
servers). This is from my notes when I worked with clients in the past:
# On clients, add full_name_format and clear cache
# Do NOT add this to the IPA servers
% vi /etc/sssd/sssd.conf
. . .
full_name_format = %1$s
# sss_cache -E or systemctl stop sssd; rm -rf /var/lib/sss/db/* ; systemctl start sssd
So some notes:
* Like in the comments, don't add that on the IPA server's sssd.conf, only to the
clients enrolled to the IPA domain.
* I cannot remember if it also drops the @domain for the groups as well. You'll have
to test this for yourself and see.