You work as the enterprise exchange administrator at Xxx .The Xxx network consists of a domain named xxx .Xxx is using Microsoft Exchange Server 2010 as their messaging solution.You have to have the Application Identifier of xxx stored in a DNS record.The Application Identifier is used for the federated trust.What actions must you take on the DNS?()
A.You must set up recipient filtering.
B.You must set up a Host (A).
C.You must use a TXT record.
D.You must use a Pointer (PTR) record.
E.You must use a Mail exchange (MX) record.