Up until last week, we had 2 DNS servers running in 2 different sites. One on the west coast and the primary on the east coast. They were both 2003 domain controllers and we extended the schema so that a new 2012 server could be promoted to a domain controller in the east coast as a 2nd DNS server and another 2008 domain controller was promoted in the west coast site so all in all there are currently 4 DNS servers, 2 on each site. My question is, that all 4 are reporting as authoritative and wanted to know if this is correct given that they are all active directory integrated. The main or primary DNS server resides in east coast and is 2003 server. Also, each server is pointing to the primary in east coast as the primary dns server on its nic card settings and the secondary for each is the loopback of 127.0.0.1. In the event of the primary going down, would the others take over automatically or would i have to point the client machines to the other servers ip address? Thanks.