You are the messaging engineer for your company.

You have deployed Exchange Server 2007. The Mailbox server role has been deployed on a server named Server1.

The network is connected to the Internet through a single firewall. All outbound ports are open. Your firewall is configured to allow only inbound TCP port 443 to Server1.

You need to recommend changes to the Exchange Server 2007 organization to meet the following requirements:

Provide local and remote access to user mailboxes from Microsoft Office Outlook 2007.
Provide content, sender, and SenderID filtering on all inbound messages received from the Internet.

What changes should you recommend?

A.
Install the Hub Transport server role on Server1. Configure an EdgeSync subscription on Server1.
Configure the firewall to allow inbound TCP port 25 and 50636 to Server1.

B.
Install the Edge Transport server role on another server. Activate the anti-spam agents on that server.
Configure the firewall to allow inbound TCP port 25 and 50389 to Server1.

C.
Install the Client Access server role and Unified Messaging server role on Server1. Create a dial plan on
Server1. Configure the firewall to allow inbound TCP port 25 to Server1.

D.
Install the Client Access server role and Hub Transport server role on Server1. Install and activate the
anti-spam agents on Server1. Configure the firewall to allow inbound TCP port 25 to Server1.