Hello All, WIndows DC reports (not for the entire directory, just a portion. See outputs below). "The replication operation failed because of a schema mismatch between the servers involved.? I suspect the error is a red herring. Running several Samba DCs at multiple sites. Version 4.11.6-Debian from Louis?s repo (on Ubuntu 18) ?vdcw00? is the Windows 2012 R2 server ?cdcx15? is the Samba Domain Controller Schema version is 69 Command: (on cdcx15) sudo /usr/bin/samba-tool ldapcmp -d9 --filter="whenChanged,dc,DC,cn,CN" ldap://cdcx15 ldap://vdcw00 -Umyadminuser Errors: ERROR(<class 'KeyError'>): uncaught exception - 'managedObjects' 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): Command: (on cdcx15) sudo samba-tool drs replicate vdcw00 cdcx15 DC=MY,DC=ORGNAME,DC=TLD --sync-all --full-sync -d9 Error: drsuapi_DsReplicaSync: struct drsuapi_DsReplicaSync out: struct drsuapi_DsReplicaSync result : WERR_DS_DRA_INVALID_PARAMETER ERROR(<class 'samba.drs_utils.drsException'>): DsReplicaSync failed - drsException: DsReplicaSync failed (8437, 'WERR_DS_DRA_INVALID_PARAMETER') 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) ==== smb.conf [global] idmap_ldb:use rfc2307 = True log level = dsdb_audit:4 acls:4 dsdb_json_audit:4@/var/log/samba/sam_audit.json dsdb_password_audit:5 dsdb_password_json_audit:5@/var/log/samba/passwd_change.json auth_audit:5 auth_json_audit:3@/var/log/samba/auth_audit.json auth:3 passdb:4 winbind:2 logging = syslog at 2 file:2 netbios name = CDCX15 realm = MY.ORGNAME.TLD server role = active directory domain controller server services = s3fs, rpc, nbt, wrepl, ldap, cldap, kdc, drepl, winbindd, ntp_signd, kcc, dnsupdate tls cafile = tls/int_ca.pem tls certfile = tls/cert.pem tls enabled = True tls keyfile = tls/cert.key workgroup = ORGNAME [netlogon] path = /var/lib/samba/sysvol/my.orgname.tld/scripts read only = False [sysvol] path = /var/lib/samba/sysvol read only = False ==== repadmin /showrepl (on the Windows DC ?vdcw00?) C:\Windows\system32>repadmin /showrepl Repadmin: running command /showrepl against full DC localhost sv2\VDCW00 DSA Options: IS_GC Site Options: (none) DSA object GUID: 8061349d-41dc-48d6-b782-d30b7bf9627d DSA invocationID: 82dd2ddf-1f5f-4dd6-acfd-4fa18fc8c4f0 ==== INBOUND NEIGHBORS =====================================DC=my,DC=orgname,DC=tld sv2\CDCX17 via RPC DSA object GUID: 79f10c50-b533-4718-a949-c6d3ac018526 Last attempt @ 2020-02-25 11:25:17 was delayed for a normal reason, result 8418 (0x20e2): The replication operation failed because of a schema mismatch between the servers involved. Last success @ 2020-02-17 19:01:07. sv2\CDCX15 via RPC DSA object GUID: 8d7427e1-bb65-44db-a046-32037823805f Last attempt @ 2020-02-25 11:25:18 was delayed for a normal reason, result 8418 (0x20e2): The replication operation failed because of a schema mismatch between the servers involved. Last success @ 2020-02-17 19:01:06. CN=Configuration,DC=my,DC= orgname,DC= tld sv2\CDCX15 via RPC DSA object GUID: 8d7427e1-bb65-44db-a046-32037823805f Last attempt @ 2020-02-25 11:23:31 was successful. sv2\CDCX17 via RPC DSA object GUID: 79f10c50-b533-4718-a949-c6d3ac018526 Last attempt @ 2020-02-25 11:23:37 was successful. CN=Schema,CN=Configuration,DC=my,DC= orgname,DC=tld sv2\CDCX17 via RPC DSA object GUID: 79f10c50-b533-4718-a949-c6d3ac018526 Last attempt @ 2020-02-25 11:25:18 was successful. sv2\CDCX15 via RPC DSA object GUID: 8d7427e1-bb65-44db-a046-32037823805f Last attempt @ 2020-02-25 11:25:18 was successful. DC=ForestDnsZones,DC=my,DC= orgname,DC= tld sv2\CDCX17 via RPC DSA object GUID: 79f10c50-b533-4718-a949-c6d3ac018526 Last attempt @ 2020-02-25 10:55:25 was successful. sv2\CDCX15 via RPC DSA object GUID: 8d7427e1-bb65-44db-a046-32037823805f Last attempt @ 2020-02-25 10:55:29 was successful. DC=DomainDnsZones,DC=my,DC= orgname,DC= tld sv2\CDCX15 via RPC DSA object GUID: 8d7427e1-bb65-44db-a046-32037823805f Last attempt @ 2020-02-25 11:25:17 was successful. sv2\CDCX17 via RPC DSA object GUID: 79f10c50-b533-4718-a949-c6d3ac018526 Last attempt @ 2020-02-25 11:25:17 was successful. ==== from cdcx15 ?samba-tool drs showrepl" ==== INBOUND NEIGHBORS === . . . DC=na,DC=joby,DC=aero sv2\VDCW00 via RPC DSA object GUID: 8061349d-41dc-48d6-b782-d30b7bf9627d Last attempt @ Tue Feb 25 20:15:22 2020 UTC was successful 0 consecutive failure(s). Last success @ Tue Feb 25 20:15:22 2020 UTC ==== OUTBOUND NEIGHBORS === DC=na,DC=joby,DC=aero sv2\VDCW00 via RPC DSA object GUID: 8061349d-41dc-48d6-b782-d30b7bf9627d Last attempt @ Tue Feb 25 20:17:30 2020 UTC was successful 0 consecutive failure(s). Last success @ Tue Feb 25 20:17:30 2020 UTC