The DNS planning section of Administering Windows Server Hybrid Core Infrastructure states: "Private internal namespaces are not resolvable via Internet root hints. For resolution across internal DNS zones hosted on different servers, use zone delegation, stub zones, or conditional forwarders so that each server can reach the authoritative source." In the scenario, Server1 hosts contoso.local , which already con tains delegations to east.contoso.local and west.contoso.local . However, Server2 (east) and Server3 (west) have no knowledge of the parent zone (contoso.local) and, because all servers use only root hints, queries for contoso.local from Server2/Server3 can not be resolved by recursion on the public roots. The proposed fix adds a conditional forwarder on Server2 for west.contoso.local and on Server3 for east.contoso.local , which enables cross-child resolution, but does not provide a path to resolve contoso.lo cal from Server2 or Server3. The guidelines further note: "To ensure all servers can resolve all internal namespaces, configure forwarders (or stub zones/secondaries) to the authoritative servers for each internal zone, including the parent zone." Because the solution omits a forwarder (or stub/secondary) on Server2 and Server3 for contoso.
local , it does not meet the goal.