samba - Jun 2020 - Trouble to keep replication in sync - W2008R2

Hi,

I have 3 Debian Buster DC running Samba 4.12.3, each one on a site.

Now I have to add a Windows 2008R2 server as DC, but failing miserably 
to stabilize it for the past 2 weeks. First, kcc did not created NTDS 
connections automatically, had to create them by hand. Some days have 
passed and now when I try to replicate from samba to windows, *both on 
same site*, I get this:

root at araucaria:~# samba-tool drs replicate urucum araucaria 
DC=ad,DC=a1,DC=ind,DC=br
ERROR(<class 'samba.drs_utils.drsException'>): DsReplicaSync
failed -
drsException: DsReplicaSync failed (8418, 'WERR_DS_DRA_SCHEMA_MISMATCH')
 ? File "/usr/lib/python3/dist-packages/samba/netcmd/drs.py", line
577,
in run
 ??? drs_utils.sendDsReplicaSync(server_bind, server_bind_handle, 
source_dsa_guid, NC, req_options)
 ? File "/usr/lib/python3/dist-packages/samba/drs_utils.py", line 92,
in
sendDsReplicaSync
 ??? raise drsException("DsReplicaSync failed %s" % estr)
root at araucaria:~# samba-tool ldapcmp ldap://urucum ldap://araucaria schema

* Comparing [SCHEMA] context...

* Objects to be compared: 1550

* Result for [SCHEMA]: SUCCESS
root at araucaria:~# samba-tool ldapcmp ldap://urucum ldap://araucaria 
configuration

* Comparing [CONFIGURATION] context...

* Objects to be compared: 1693
ERROR(<class 'KeyError'>): uncaught exception -
'instanceType'
 ? 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/ldapcmp.py", line
957, in run
 ??? if b1.diff(b2):
 ? File "/usr/lib/python3/dist-packages/samba/netcmd/ldapcmp.py", line
781, in diff
 ??? if object1 == object2:
 ? File "/usr/lib/python3/dist-packages/samba/netcmd/ldapcmp.py", line
549, in __eq__
 ??? return self.cmp_attrs(other)
 ? File "/usr/lib/python3/dist-packages/samba/netcmd/ldapcmp.py", line
590, in cmp_attrs
 ??? if isinstance(self.attributes[x], list) and 
isinstance(other.attributes[x], list):
root at araucaria:~#

Any ideas? Thanks in advance.


-- 
*Marcio Merlone*