Hi everyone, I hope you're all doing well. I recently added a 3rd DC to my domain within a different site, but it seems to be having issues when I try to run samba_dnsupdate. My other two DC, who are on the default site, has no issues when running the command. I'll post the error below: Samba4 version: 4.10.2 .... Failed nsupdate: 2 update(nsupdate): SRV _ldap._tcp.DemoSite._sites.ForestDnsZones.example.com <http://sites.forestdnszones.example.com/> DC3.example.com <http://dc3.example.com/> 389 Calling nsupdate for SRV _ldap._tcp.DemoSite._ sites.ForestDnsZones.example.com <http://sites.forestdnszones.example.com/> DC3.example.com <http://dc3.example.com/> 389 (add) Successfully obtained Kerberos ticket to DNS/DC3.example.com <http://dc3.example.com/> as DC3$ Outgoing update query: ;; ->>HEADER<<- opcode: UPDATE, status: NOERROR, id: 0 ;; flags:; ZONE: 0, PREREQ: 0, UPDATE: 0, ADDITIONAL: 0 ;; UPDATE SECTION: _ldap._tcp.DemoSite._sites.ForestDnsZones.example.com <http://sites.forestdnszones.example.com/>. 900 IN SRV 0 100 389 DC3.example.com <http://dc3.example.com/>. ... ; TSIG error with the server: tsig verify failure Failed nsupdate: 2 Failed update of 28 entries ... My resolv.conf: ... search example.com nameserver 172.16.0.172 nameserver 10.10.10.170 nameserver 10.10.10.171 ... The DC in question uses 172.16.0.172, as it's in a different site on a different subnet. Please let me know if you require additional clarification or information. Thank you, Philip