A corporate environment includes Exchange Server 2003 SP2 and an Active Directory Domain
Services (AD DS) forest with two domains. The forest functional level is set to Windows 2000. The
domain functional level of Domain1 is set to Windows 2000 mixed. The domain functional level of
Domain2 is set to Windows 2000 native. The AD DS infrastructure is shown in the following table.

The company plans to transition to Exchange Server 2010 SP1. The new infrastructure must support
Windows Server 2003 SP1 domain controllers. You need to recommend a solution for preparing the
existing AD DS infrastructure to support Exchange Server 2010 SP1. Which two actions should you
recommend? (Each correct answer presents part of the solutions. Choose two.)

A.
Raise the functional level of Domain1 to Windows 2000 native. Raise the functional level of the
forest to Windows Server 2003.

B.
Replace DC3 and DC4 with domain controllers running Windows Server 2008.

C.
Raise the functional level of Domain1 to Windows 2008 R2. Raise the functional level of the forest
to Windows Server 2008.

D.
Replace DC2 and DC4 with domain controllers running Windows Server 2008 R2.