autoinstallation in Leap 42.3-Build0270,

  <auth-client>
    <sssd>yes</sssd>
    <sssd_conf>
       ...
    </sssd_conf>
  </auth-client>

-- Unit sssd.service has begun starting up.
Jun 08 12:59:28 linux sssd[973]: SSSD couldn't load the configuration database
[2]: No such file or directory.
Jun 08 12:59:28 linux systemd[1]: sssd.service: Control process exited,
code=exited status=4

/var/log/sssd.log:
(Thu Jun  8 12:59:28:803060 2017) [sssd] [confdb_get_domains] (0x0010): No
domains configured, fatal error!
(Thu Jun  8 12:59:28:803117 2017) [sssd] [get_monitor_config] (0x0010): No
domains configured.
(Thu Jun  8 12:59:28:803159 2017) [sssd] [main] (0x0020): SSSD couldn't load
the configuration database.

This didn���t happen during autoinstallation in Leap 42.2. SSSD does eventually
get configured and started so after the initial boot, authentications
configured through SSSD do work.

-- Unit sssd.service has begun starting up.
Jun 08 13:00:00 linux sssd[3505]: Starting up
Jun 08 13:00:02 linux sssd[be[3530]: Starting up
Jun 08 13:00:02 linux sssd[3531]: Starting up
Jun 08 13:00:02 linux sssd[3532]: Starting up
-- Unit sssd.service has finished starting up.
Jun 08 13:05:40 Hostname sssd[3532]: Shutting down
-- Unit sssd.service has begun shutting down.
Jun 08 13:05:40 Hostname sssd[3531]: Shutting down
Jun 08 13:05:40 Hostname sssd[be[3530]: Shutting down
-- Unit sssd.service has finished shutting down.
Jun 08 13:05:41 Hostname sssd[11594]: Starting up
Jun 08 13:05:41 Hostname sssd[be[11595]: Starting up
Jun 08 13:05:41 Hostname sssd[11597]: Starting up
Jun 08 13:05:41 Hostname sssd[11596]: Starting up
-- Unit sssd.service has finished starting up.

Could be that <auto-client> isn���t performed before sssd service is started the
first time.