A corporate environment includes Exchange Server 2003 SP2 and an Active Directory Domain Services (AD DS) domain. The company intends to transition to Exchange Server 2010. The Exchange 2003 Recipient Update Service (RUS) must function properly after you update the AD DS schema for Exchange Server 2010. You need to recommend a solution for preparing the environment before updating the schema.
What should you recommend?
A.
Run the setup /PrepareDomain command.
B.
Run the setup /PrepareLegacyExchangePermissions command.
C.
Add each Exchange Server 2010 server to the Exchange Domain Servers group in AD DS.
D.
Add each Exchange Server 2010 Mailbox server to the Exchange Enterprise Servers group in AD DS.