Hi Samba Wizards, I have a domain with (2) 4.12.14 DCs (VDC3 and VDC4). I added a 4.13.9 DC to the domain (VDC5). When I run ldapcmp I get the following: samba-tool ldapcmp ldap://VDC3 ldap://VDC5 -Uadministrator --filter=msDS-NcType,serverState,subrefs Password for [KMG\administrator]: * Comparing [DOMAIN] context... * Objects to be compared: 836 Comparing: 'CN=VDC5,OU=DOMAIN CONTROLLERS,DC=KMG,DC=MYDOMAIN,DC=COM' [ldap://VDC3] 'CN=VDC5,OU=DOMAIN CONTROLLERS,DC=KMG,DC=MYDOMAIN,DC=COM' [ldap://VDC5] Attributes found only in ldap://VDC5: SERVERREFERENCEBL FAILED * Result for [DOMAIN]: FAILURE SUMMARY --------- Attributes found only in ldap://VDC5: SERVERREFERENCEBL * Comparing [CONFIGURATION] context... * Objects to be compared: 1621 * Result for [CONFIGURATION]: SUCCESS * Comparing [SCHEMA] context... * Objects to be compared: 1550 * Result for [SCHEMA]: SUCCESS * Comparing [DNSDOMAIN] context... * Objects to be compared: 660 * Result for [DNSDOMAIN]: SUCCESS * Comparing [DNSFOREST] context... * Objects to be compared: 34 * Result for [DNSFOREST]: SUCCESS ERROR: Compare failed: -1 If I run the ldapcmp from the new DC I get the following: samba-tool ldapcmp ldap://VDC5 ldap://VDC3 -Uadministrator --filter=msDS-NcType,serverState,subrefs Password for [KMG\administrator]: * Comparing [DOMAIN] context... * Objects to be compared: 836 ERROR(<class 'KeyError'>): uncaught exception - 'serverReferenceBL' File "/usr/local/samba/lib64/python3.6/site-packages/samba/netcmd/__init__.py", line 186, in _run return self.run(*args, **kwargs) File "/usr/local/samba/lib64/python3.6/site-packages/samba/netcmd/ldapcmp.py", line 957, in run if b1.diff(b2): File "/usr/local/samba/lib64/python3.6/site-packages/samba/netcmd/ldapcmp.py", line 781, in diff if object1 == object2: File "/usr/local/samba/lib64/python3.6/site-packages/samba/netcmd/ldapcmp.py", line 549, in __eq__ return self.cmp_attrs(other) File "/usr/local/samba/lib64/python3.6/site-packages/samba/netcmd/ldapcmp.py", line 590, in cmp_attrs if isinstance(self.attributes[x], list) and isinstance(other.attributes[x], list): samba-tool drs showrepl does not show any problems. How do I troubleshoot/repair this problem? Is this even something to be worried about? Regards, -- Tom me at tdiehl.org