You have an Exchange Server 2010 organization. The organization is authoritative for the domain contoso.com.
You create a federated trust.
You need to ensure that federated partners can automatically locate the Client Access servers in the organization.
What should you create from an external DNS server?
A. an A record for autodiscover.contoso.com.
B. an A record for FederatedSharing.contoso.com.
C. an SRV record for _autodiscover._TCP._msdcs.contoso.com.
D. an SRV record for _FederatedSharing._UDP._msdcs.contoso.com.
