You have an Exchange Server 2010 organization. Users access the internal network by using a server
named ISA1 that runs Microsoft Internet Security and Acceleration (ISA) Server. You need to
configure mailbox access from the Internet to meet the following requirements:
• Users must be able to download an offline address book (OAB)
• Users must be able to access their mailboxes by using Outlook Anywhere
• Users must be able to access their mailboxes by using Outlook Web App (OWA)
• The solution must minimize administrative overhead
What should you create from ISA1?

A.
an access rule for TCP ports 135, 389, and 993

B.
an access rule for TCP ports 389, 636, and 1024

C.
publishing rules for the OWA, EWS, RPC, Autodiscover, and OAB virtual directories

D.
publishing rules for the OWA, Microsoft-Server-ActiveSync, Public, and OAB virtual directories