Dear all, I have joined samba 4.1.18 (FreeBSD 9.1) to an Active Directory domain as an active directory domain controller. The domain has two other Windows Server 2008 R2 DCs. Both windows and samba complain about replication problems. Windows reports that replication from Windows DCs to Samba completes successfully, but replication from Samba to Windows fails with error "The replication operation failed because of a schema mismatch between the servers involved." Samba log file has the following messages: IRPC callback failed for DsReplicaGetInfo - NT_STATUS_IO_TIMEOUT Furthermore, I have # samba-tool drs showrepl Default-First-Site-Name\GW DSA Options: 0x00000001 DSA object GUID: 0438096c-1ec2-473e-b33d-b26bc694264b DSA invocationId: 06f7b785-f193-47b6-b753-83f337a85710 ==== INBOUND NEIGHBORS === ERROR(runtime): DsReplicaGetInfo of type 0 failed - (-1073610723, 'NT_STATUS_RPC_PROTOCOL_ERROR') What is the reason for this problem and how can it be fixed? With best regards, P. Trifonov
Hello Peter, Am 14.07.2015 um 20:55 schrieb Peter Trifonov:> Windows reports that replication from Windows DCs to Samba > completes successfully, but replication from Samba to Windows > fails with error "The replication operation failed because of > a schema mismatch between the servers involved."What schema version does your AD have? http://www.itguydiaries.net/2012/09/how-to-find-current-active-directory.html Samba is shipped with AD schema 47 (MS Windows Server 2008 R2). Maybe you already run a newer schema version or had done schema enhancements, that are currently not supported by Samba. A mixed DC environment Samba with 2008R2 servers is working https://wiki.samba.org/index.php/Joining_a_Windows_Server_2008_/_2008_R2_DC_to_a_Samba_AD - at least with the unmodified schema version 47. Regards, Marc
Hello Marc,> What schema version does your AD have? > http://www.itguydiaries.net/2012/09/how-to-find-current-active- > directory.html > > Samba is shipped with AD schema 47 (MS Windows Server 2008 R2). Maybe > you already run a newer schema version or had done schema enhancements, > that are currently not supported by Samba.AD scheme version is 47. However, a few years ago some software (Office Communication Server) was installed, which required extending the schema. Can this be a reason for this problem? With best regards, P. Trifonov