Samba 4.12.5 Windows AD 2012R2 integration

[Izzet Aydın]

Hello everybody,

I'm trying to add my samba server as an additional domain controller to 
an existing Windows Server 2012R2 AD server.

However, even if i use samba 4.12.5 version i get following error:

#samba-tool domain join domain.fqdn DC -U "DOMAIN\admin"

INFO 2020-07-23 15:10:25,275 pid:2804 
/usr/lib/python3/dist-packages/samba/join.py #107: Finding a writeable 
DC for domain 'domain.fqdn'
INFO 2020-07-23 15:10:25,284 pid:2804 
/usr/lib/python3/dist-packages/samba/join.py #109: Found DC dc1.domain.fqdn
Password for [DOMAIN\admin]:
INFO 2020-07-23 15:10:34,754 pid:2804 
/usr/lib/python3/dist-packages/samba/join.py #1542: workgroup is DOMAIN
INFO 2020-07-23 15:10:34,754 pid:2804 
/usr/lib/python3/dist-packages/samba/join.py #1545: realm is domain.fqdn
Adding CN=samba,OU=Domain Controllers,DC=domain,DC=fqdn
Adding 
CN=samba,CN=Servers,CN=domain,CN=Sites,CN=Configuration,DC=domain,DC=fqdn
Adding CN=NTDS 
Settings,CN=samba,CN=Servers,CN=domain,CN=Sites,CN=Configuration,DC=domain,DC=fqdn
DsAddEntry failed with status WERR_ACCESS_DENIED info (8567, 
'WERR_DS_INCOMPATIBLE_VERSION')
Join failed - cleaning up
Adding CN=samba,OU=Domain Controllers,DC=domain,DC=fqdn
Adding 
CN=samba,CN=Servers,CN=domain,CN=Sites,CN=Configuration,DC=domain,DC=fqdn
ERROR(runtime): uncaught exception - DsAddEntry failed
   File "/usr/lib/python3/dist-packages/samba/netcmd/__init__.py", line 
186, in _run
     return self.run(*args, **kwargs)
   File "/usr/lib/python3/dist-packages/samba/netcmd/domain.py", line 
664, in run
     join_DC(logger=logger, server=server, creds=creds, lp=lp, 
domain=domain,
   File "/usr/lib/python3/dist-packages/samba/join.py", line 1558, in 
join_DC
     ctx.do_join()
   File "/usr/lib/python3/dist-packages/samba/join.py", line 1446, in 
do_join
     ctx.join_add_objects()
   File "/usr/lib/python3/dist-packages/samba/join.py", line 682, in 
join_add_objects
     ctx.join_add_ntdsdsa()
   File "/usr/lib/python3/dist-packages/samba/join.py", line 607, in 
join_add_ntdsdsa
     ctx.DsAddEntry([rec])
   File "/usr/lib/python3/dist-packages/samba/join.py", line 548, in 
DsAddEntry
     raise RuntimeError("DsAddEntry failed")

Windows 2012r2 schema version is 69.

Where should i check to resolve this issue ?

Thanks in advance.