Hi!

I've set up samba4 as ad-dc -- worked right away.
Exported the keytab. "klist -ke" looks good:
Keytab name: FILE:/etc/krb5.keytab
KVNO Principal
---- --------------------------------------------------------------------------
   1 Administrator@ADA.DE (aes256-cts-hmac-sha1-96)
   1 Administrator@ADA.DE (aes128-cts-hmac-sha1-96)
   1 Administrator@ADA.DE (arcfour-hmac)
   1 Administrator@ADA.DE (etype 3)
   1 Administrator@ADA.DE (etype 1)
   1 krbtgt@ADA.DE (aes256-cts-hmac-sha1-96)
   1 krbtgt@ADA.DE (aes128-cts-hmac-sha1-96)
   1 krbtgt@ADA.DE (arcfour-hmac)
   1 krbtgt@ADA.DE (etype 3)
   1 krbtgt@ADA.DE (etype 1)
   1 AD01$@ADA.DE (aes256-cts-hmac-sha1-96)
   1 AD01$@ADA.DE (aes128-cts-hmac-sha1-96)
   1 AD01$@ADA.DE (arcfour-hmac)
   1 AD01$@ADA.DE (etype 3)
   1 AD01$@ADA.DE (etype 1)

checked kinit with the servers name:
# kinit -k AD01\$@ADA.DE
# klist
Ticketzwischenspeicher: FILE:/tmp/krb5cc_0
Standard-Principal: AD01$@ADA.DE

Valid starting       Expires              Service principal
25.10.2019 19:00:20  26.10.2019 05:00:20  krbtgt/ADA.DE@ADA.DE
        erneuern bis 01.11.2019 18:00:20

looks good too.
Then configured sssd:
[sssd]
config_file_version = 2
reconnection_retries = 3
sbus_timeout = 30
services = nss, pam, pac
domains = ADA.DE
#debug_level = 0x0270

[domain/ADA.DE]
enumerate = true
cache_credentials = true

id_provider = ad
auth_provider = ad
sudo_provider = none
chpass_provider = ad
access_provider = ad

ad_server = ad01.ada.de, ad02.ada.de
ad_maximum_machine_account_password_age = 30
ldap_id_mapping = false
use_fully_qualified_names = false
fallback_homedir = /home/%d/%u
fallback_shell = /bin/bash
skel_dir = /etc/skel

ldap_schema = ad

dyndns_update = false
dyndns_refresh_interval = 43200
dyndns_update_ptr = false
dyndns_ttl = 3600

debug_level = 0x0270

[nss]
filter_groups = root
filter_users = root
reconnection_retries = 3
#debug_level = 0x0270

[pam]
reconnection_retries = 3
#debug_level = 0x0270

[pac]
reconnection_retries = 3
#debug_level = 0x0270

Then tried:
# getent passwd Administrator@ADA.DE
#

and got nothing. 
Any idea anyone? 

--
Thomas