A corporate environment includes Exchange Server 2003 SP2. Client computers run Microsoft Office Outlook 2003. You deploy Exchange Server 2010 in the existing Exchange organization, and then install Exchange Server 2010 SP1 on all the Exchange Server 2010 servers. The company intends to move mailboxes from Exchange Server 2003 SP2 to Exchange Server 2010 SP1. You need to recommend a solution for ensuring that after their mailboxes are moved, users can open their mailboxes by using Outlook 2003.
What should you recommend?
A.
Configure Outlook 2003 to use NTLM authentication
B.
Configure Outlook 2003 to encrypt data between Outlook and the Exchange server.
C.
Obtain and install an SSL certificate for each Exchange Server 2010 SP1 Mailbox server.
D.
Obtain and install an SSL certificate for each Exchange Server 2010 SP1 Client Access server.