Currently my Samba 4 AD set up does not add in SRV RRs for sites that do not have domain controllers. I have configured sites, links, costs, subnets, etc. and these appear to be working correctly for the sites that have a DC. On the page https://technet.microsoft.com/en-us/library/cc759550(WS.10).aspx linked to from https://wiki.samba.org/index.php/Active_Directory_Sites in the "Automatic Site Coverage" section "A domain controller advertises itself (registers a site-related SRV record in DNS) in any site that does not have a domain controller for that domain and for which its site has the lowest-cost connections. " Is this functionality implemented in Samba? Is it safe to add in the Site entries by hand? Thanks Mike