[2017/01/13 13:49:16.075361,  1] ../source4/auth/gensec/gensec_gssapi.c:619(gensec_gssapi_update)
      GSS server Update(krb5)(1) Update failed:  Miscellaneous failure (see text): Failed to find DC1$EXAMPLE.ORG(kvno 7) in keytab FILE:/var/lib/samba/private/secrets.keytab (arcfour-hmac-md5)
    [2017/01/13 13:49:16.075405,  1] ../auth/gensec/spnego.c:541(gensec_spnego_parse_negTokenInit)
      SPNEGO(gssapi_krb5) NEG_TOKEN_INIT failed: NT_STATUS_LOGON_FAILURE

Keytab name: FILE:/var/lib/samba/private/secrets.keytab
KVNO Principal
---- --------------------------------------------------------------------------
   1 HOST/dc1@EXAMPLE.ORG (des-cbc-crc)
   1 HOST/dc1.example.org@EXAMPLE.ORG (des-cbc-crc)
   1 DC1$@EXAMPLE.ORG (des-cbc-crc)
   1 HOST/dc1@EXAMPLE.ORG (des-cbc-md5)
   1 HOST/dc1.example.org@EXAMPLE.ORG (des-cbc-md5)
   1 DC1$@EXAMPLE.ORG (des-cbc-md5)
   1 HOST/dc1@EXAMPLE.ORG (arcfour-hmac)
   1 HOST/dc1.example.org@EXAMPLE.ORG (arcfour-hmac)
   1 DC1$@EXAMPLE.ORG (arcfour-hmac)
   1 HOST/dc1@EXAMPLE.ORG (aes128-cts-hmac-sha1-96)
   1 HOST/dc1.example.org@EXAMPLE.ORG (aes128-cts-hmac-sha1-96)
   1 DC1$@EXAMPLE.ORG (aes128-cts-hmac-sha1-96)
   1 HOST/dc1@EXAMPLE.ORG (aes256-cts-hmac-sha1-96)
   1 HOST/dc1.example.org@EXAMPLE.ORG (aes256-cts-hmac-sha1-96)
   1 DC1$@EXAMPLE.ORG (aes256-cts-hmac-sha1-96)