The Exchange organization contains single server name ExM01 which hosts all the user mailboxes. All remote user access mails by using MS outlook Express and all internal users access mails by using MS outlook. You as Exchange Admin had setup new public folders. All internal users can successfully access the new folders, but some remote users cannot. All users however can access their personal mailbox. What should you do to resolve the problem?
a. Instruct the users who cannot access the folders to recreate their Outlook Express email accounts as IMAP accounts
b. Instruct the users sho cannot access the folders to establish a VPN connection with the internal network before they open Outlook Express
c. Modify the company firewall so thst only SMTP, HTTP and POP3 traffic is allowed to pass to ExM01
d. Modify the company firewall so that NNTP is added to the list of protocols allowed to pass to ExM01
I think d.because NNTP for folders. However How it can be done on firewall.