The servers in your companys Exchange Server 2007 environment are configured as shown in the following table.

Users require Internet Message Access Protocol Version 4 rev1 (IMAP4) to access their e-mail. You enable IMAP4 access on the appropriate mailboxes.
You need to ensure that users are able to access their e-mail by using IMAP4. On which server should you configure the IMAP4 service?

A.
Server1

B.
Server2

C.
Server3

D.
Server4