Your company has two Active Directory Domain Services (AD DS) forests. Both forests have a forest functional level of Windows Server 2003 interim. All domains in the two forests have a domain functional level of Windows 2000 Server native. All domain controllers have either Windows Server 2003 or Windows Server 2008 installed. You are preparing to install Exchange Server 2007 into both forests. You need to ensure that users are able to select the type of free/busy information that will be available to users in another forest. What should you do?
A.
Raise the forest functional level to Windows Server 2008 in both forests
B.
Raise the forest functional level to Windows Server 2003 in both forests
C.
Raise the domain functional level to Windows Server 2003 in all domains in both forests
D.
Raise the domain functional level to Windows Server 2008 in all domains in both forests