You have an Exchange organization. All servers in the organization have Exchange Server 2010 SP1 installed. The network contains internal DNS servers.
You need to ensure that the Hub Transport servers use external DNS servers when they resolve Internet names.
What should you modify?
A.
The properties of the Hub Transport server object.
B.
The message delivery properties of the Hub Transport global settings.
C.
The properties of the default remote domain.
D.
The properties of a Send connector.
Explanation:
Reference:http://technet.microsoft.com/en-us/library/bb123514.aspx
This answer should be Send connector properties. Check the given link in technet. here is the relevant para:
Use the External DNS Lookups tab to specify whether to use the DNS servers that are configured on a network adapter installed on this server or to use specific DNS servers when resolving the addresses of mail servers for external mail delivery. External DNS servers are used by Send connectors that are configured to use the external DNS lookup configuration on the transport server. When messages are routed to these Send connectors, the external DNS lookup settings that are configured for the source servers are used to resolve IP addresses for the delivery destination.
You can choose one of the following options: