Your Microsoft Exchange Server 2007 environment has a single Client Access server. All client computers have Microsoft Office Outlook 2007 installed. You use an external firewall. You need to ensure that all users are able to access e-mail, free/busy information, and public folders from the Internet. What should you do?
A.
On the firewall, allow TCP port 993 connections from the Internet to the corporate network.
B.
On the firewall, allow TCP port 995 connections from the Internet to the corporate network.
C.
Enable Outlook Anywhere on the Client Access server.
D.
Create a new Exchange ActiveSync Mailbox Policy, and assign it to all users.