Hi Guys, I was thrown off by the subject and would love to know if you could ever resolve this problem. I'm facing the same issues. For various $reasons I need an additional Windows DC in my domain and as Moe described everything looks fine until you try DNS stuff. My environment: DC-01 (Ubuntu 12.04 LTS) DC-02 (Ubuntu 12.04 LTS) Samba: Version 4.1.17 (build from sources) Forest function level: (Windows) 2008 R2 Domain function level: (Windows) 2008 R2 DNS via BIND_DLZ with bind version 9.9.5 (Extended Support Version) The domain was created with samba3 as an NT-style domain and migrated with samba 4.0.7(?) using classicupgrade. Since I'm a cautios guy I tried this with a copy of my live env in an isolated vlan first (cloned my dc VMs, added a windows vm) Doing this allowed me a bit of testing while debugging the problem. The windows dc I'm trying to add is running windows 2008 r2 standard edition with the latest patches. I tried without success: - Going back from BIND_DLZ to internal DNS before adding the windows dc - Upgrading Samba (to 4.2.0) - Moving the FSMO role for domain naming to the windows dc (which made things really worse) And to answers Marcs questions: * What is the error message? Same message as Moe is seeing * When you create a DNS entry on the Samba server, is it replicated to the Win DC? Yes * Does the behaviour changes, if you temporary shutdown Samba on the first DC while you create the record? no * Who build the domain? I mean: Who was first and populated the AD? Windows or Samba? samba We might be facing this problem: http://blogs.msmvps.com/acefekay/2012/06/20/steps-taken-to-resolve-an-issue-with-corrupted-application-partitions-specifically-dns-partitions-and-their-crossref-erence-objects-in-the-ad-configuration-container/ dcdiag /test:dns Throws some errors.... I'll collect some logs and screenshots. Regards, Dominik Hello Marc,> > 1. The error message is > > > "The host record test.salem.int cannot be created. Refused" > > > and in the event log > > > "The following application directory partition has no security descriptor reference domain. Application directory partition: DC=DomainDnsZones,DC=salem,DC=int The root domain will be used instead. User Action Set the security descriptor reference domain for this application directory partition." > > > > 2. Yes, When you create a DNS entry it is replicated to the Win DC. AND if you modify a DNS entry it is replicated from the WIN DC to the samba DC's. > > > 3. Disabling Samba on the DC before creating it on the win DC does not do anything. > > > 4. Samba first built and populated the domain. > > > > > Thanks, > > > Moe > >