Your company merges with Contoso, Ltd. Each companys mixed e-mail system includes Exchange Server 2003 servers and Exchange Server 2007 servers, and Outlook 2003 clients and Outlook 2007 clients. Currently your company has a single remote SMTP domain for *, which is configured with the Allow none option. You need to configure the delivery of out-of-office (OOF) messages to the contoso.com domain, and you must ensure that no users outside of the two merged companies can receive OOF messages. What should you do?

A.
On the remote domain *, select the Allow external out-of-office only option

B.
On the remote domain *, select the Allow external out-of-office and out-of-office set by Outlook 2003 or earlier clients and set on Exchange 2003 or earlier servers option

C.
Add a new remote domain for *.contoso.com, and select the Allow external out-of-office only option

D.
Add a new remote domain for *.contoso.com, and select the Allow internal out-of-office and out- of-office set by Outlook 2003 or earlier clients and set on Exchange 2003 or earlier servers option