Your network contains two servers named Server1 and Server2 that run Windows Server 2008 R2. Server1 has Active Directory Federation Services （AD FS） 2.0 installed. Server1 is a member of an AD FS farm. The AD FS farm is configured to use a configuration database that is stored on a separate Microsoft SQL Server. You install AD FS 2.0 on Server2. You need to add Server2 to the existing AD FS farm. What should you do（）

A. On Server1， run fsconfig.exe.
B. On Server1， run fsconfigwizard.exe.
C. On Server2， run fsconfig.exe.
D. On Server2， run fsconfigwizard.exe.