Samba directory service is unavaiable

UCS - Univention Corporate Server
#1 
[2018/03/29 16:58:24.427721,  0, pid=15194] ../auth/ntlmssp/ntlmssp_sign.c:236(ntlmssp_check_packet)
  NTLMSSP NTLM2 packet check failed due to invalid signature!
[2018/03/29 16:58:24.454043,  0, pid=15195] ../auth/ntlmssp/ntlmssp_sign.c:236(ntlmssp_check_packet)
  NTLMSSP NTLM2 packet check failed due to invalid signature!
[2018/03/29 16:58:26.580637,  1, pid=15151] ../source4/dsdb/kcc/garbage_collect_tombstones.c:68(garbage_collect_tombstones_part)
  Doing a full scan on DC=DomainDnsZones,DC=ccm,DC=local and looking for deleted objects
[2018/03/29 16:58:26.583033,  1, pid=15151] ../source4/dsdb/kcc/garbage_collect_tombstones.c:68(garbage_collect_tombstones_part)
  Doing a full scan on DC=ForestDnsZones,DC=ccm,DC=local and looking for deleted objects
[2018/03/29 16:58:26.584875,  1, pid=15151] ../source4/dsdb/kcc/garbage_collect_tombstones.c:68(garbage_collect_tombstones_part)
  Doing a full scan on DC=ccm,DC=local and looking for deleted objects
[2018/03/29 16:58:26.603096,  1, pid=15151] ../source4/dsdb/kcc/garbage_collect_tombstones.c:68(garbage_collect_tombstones_part)
  Doing a full scan on CN=Configuration,DC=ccm,DC=local and looking for deleted objects

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