You are a messaging professional. Your company plans to deploy a Microsoft Exchange Server 2007 messaging system.
The company has three offices. The messaging servers and infrastructure servers are installed in all the three offices. Each office has its own Internet connection. The offices are also connected by an internal WAN.

The company decides to include spam reduction in the exiting Exchange Server 2007 deployment plan.
The company has the following requirements:

Reduce the amount of internal network traffic created by spam.
Ensure that the servers that block the spam are fault tolerant.
Distribute inbound e-mail messages from the Internet among the offices.

You need to modify the deployment plan to meet the outlined requirements.
Which three actions should you include in the plan? (Each correct answer presents part of the solution.
Choose three.)

A.
Place two Edge Transport servers on the perimeter network of each office.

B.
Place two Edge Transport servers on the perimeter network of the main office.

C.
Create Transport rules on each Edge Transport server role that has an action to drop all e-mail messages that
have a Spam Confidence Level (SCL) setting of 7 or higher.

D.
Create Transport rules on each Edge Transport server role that has an action to quarantine all e-mail
messages that have a Spam Confidence Level (SCL) setting of 7 or higher.

E.
Implement Network Load Balancing (NLB) for the Edge Transport servers at the main office.

F.
Create Round Robin records for the Edge Transport servers in each office on the Internet-facing DNS
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