You need to ensure that all email messages received by fabrikam.com users from the Internet are journaled by the contoso.com Exchange organization

You are a network administrator for a company named Contoso, Ltd. Contoso has an Exchange Server 2010 Service Pack 1 (SP1) organization named contoso.com. The organization contains the following Exchange servers:

* Two Hub Transport servers
* Two Edge Transport servers that have Edge Subscriptions

Contoso merges with another company named Fabrikam, Inc. Fabrikam has an Exchange Server 2010 SP1 organization that uses the fabrikam.com SMTP domain.

All mail exchange (MX) records for fabrikam.com point to the contoso.com Edge Transport servers. You deploy a solution for Contoso to journal all email messages by using Hub Transport rules.

You need to ensure that all email messages received by fabrikam.com users from the Internet are journaled by the contoso.com Exchange organization.

What should you do?

A.
From the Exchange Management Shell, run the new-accepteddomain -domaintype internalrelay command.

B.
From the Exchange Management Shell, run the new-sendconnector -addressspaces fabrikam.com command.

C.
From the Exchange Management Console (EMC), create an accepted domain that uses the authoritative domain type.

D.
From the Exchange Management Shell, run the new-receiveconnector -partner command.

E.
From the Exchange Management Shell, run the new-accepteddomain -domaintype externalrelay command.

F.
From the Exchange Management Console (EMC), create an accepted domain that uses the internal relay domain type.

Explanation:
Accepted Domain = Any domain whose email will be routed by the Exchange organization transport servers
Authoritative Domain = used to specify which SMTP domain is served by your Exchange organization; an exchange organization is authoritative when it handles mail delivery for recipients in the accepted domain.
Internal Relay = Hub to Hub between Exchange Organizations
External Relay = Edge to Edge between Exchange Organizations

Journaling can be done on a per user or per mailbox database basis. Journal rules can also be made Global, thereby journaling all messages that pass through the Hub Transport server.

References:

http://technet.microsoft.com/en-us/library/bb124423.aspx
http://technet.microsoft.com/en-us/library/aa996314.aspx
http://technet.microsoft.com/en-us/library/aa995975.aspx
http://technet.microsoft.com/en-us/library/aa998649.aspx
http://technet.microsoft.com/en-us/library/bb124911.aspx
http://blogs.technet.com/b/exchange/archive/2011/10/07/accepted-domains-shared-smtp-address-spaces-and-recipient-filtering.aspx