A company that is running Exchange Server 2010 merges with a company that is running Exchange Server 2007. After the merger, all external email will be delivered by the Exchange Server 2010 Hub Transport server. The company intends to keep both Exchange Server environments active for the next year.
You are designing an infrastructure deployment plan. You have the following requirements:

* Ensure that users with Exchange Server 2010 mailboxes can send external email messages to any domain.
* Ensure that users with Exchange Server 2007 mailboxes can send external email messages to only specific domains.

You need to recommend a solution that meets the requirements.

What should you recommend?

A.
Configure transport rules on the Exchange Server 2007 Hub Transport server.

B.
Configure accepted domains on the Exchange Server 2007 Hub Transport server.

C.
Configure transport rules on the Exchange Server 2010 Hub Transport server.

D.
Configure remote domains on the Exchange Server 2010 Hub Transport server.