You are a messaging professional. Your company has a Microsoft Exchange
Server 2007 messaging system.

The company has a main office and two branch offices. A Client Access Server is deployed in each office.
Only the Client Access Server at the main office is accessible on the Internet.

Users in the company work in remote sites as well as from home on computers that do not belong to the
corporate domain. The mailboxes for the remote users are located in all the three offices.

All remote users use Microsoft Office Outlook 2007.

You need to ensure that client computers are automatically configured by using the Autodiscover service.
You also need to ensure that the users are able to view availability information for other users in the company.

Which two actions should you perform? (Each correct answer presents part of the solution. Choose two.)

A.
Activate NTLM authentication for Microsoft Office Outlook Anywhere on the Client Access Server at the
main office.

B.
Modify the network configuration so that a Client Access Server is accessible on the Internet in each office.

C.
Configure valid Domain Name System (DNS) records for the Client Access Server at the main office.

D.
Configure the URL values for the Availability service, Exchange Web services, and the offline address
book to include the external Domain Name System (DNS) name for the Client Access Server at the main office.

E.
Configure the URL values for the Availability service, the Exchange Web services, and the offline address
book to include only the internal Domain Name System (DNS) name for the Client Access Server at the main
office.