You are designing an Exchange organization for a company named Contoso, Ltd. All servers in the
organization will have Exchange Server 2010 Service Pack 1 (SP1) installed. Contoso has a partner
company named Fabrikam, Inc. Fabrikam has an Exchange organization that contains only Exchange
Server 2010 SP1 servers. You plan to configure a federation trust between Fabrikam and Contoso.

You need to recommend a certificate for the federation trust. Which of the following certificates is
the best recommendation? (More than one answer choice may achieve the goal. Select the BEST
answer.)

A.
a certificate from a third-party certification authority (CA)

B.
the self-signed certificate automatically generated by the Exchange 2010 Setup wizard

C.
the self-signed certificate automatically generated by the New Federation Trust wizard

D.
a certificate from an internal certification authority (CA)

Explanation: