Your network contains an Active Directory domain named contoso.com. All domain controllers run Windows Server 2003 Service Pack 2 (SP2). You have an Exchange Server 2003 organization. The organization contains servers that run Exchange Server 2003 Service Pack 1 (SP1) and servers that run Exchange 2000 Server Service Pack 4 (SP4). The organization contains three routing groups. You need to prepare the Exchange organization for the installation of the first Exchange Server 2010 SP1 server. The solution must not affect message flow between the Exchange servers.

What should you do? (Choose all that apply.)

A.
Suppress link state updates.

B.
Install Exchange Server 2003 SP2.

C.
Remove the Exchange 2000 Server servers.

D.
Move all of the Exchange Server 2003 servers to a single administrative group.

E.
Perform an in-place upgrade of the Exchange Server 2003 servers to Exchange Server 2007 SP2.