Your network contains two Exchange Server 2010 Edge Transport servers. The network also contains five Hub Transport servers in two Active Directory sites. All e-mail sent to the network is received by the Edge Transport servers. You plan to configure anti-spam filtering. You need to ensure that the anti-spam filtering configurations are applied to both Edge Transport servers. The solution must use a minimum amount of administrative effort. What should you do？（）
- AConfigure EdgeSync synchronization.
- BImplement Active Directory Federation Services （AD FS）.
- CJoin both Edge Transport servers to an Active Directory domain and then create a forest trust from the internal forest.
- DManually configure settings on one Edge Transport server and then export the settings to the othe rEdge Transport server.