You have an Exchange Server 2010 organization. Your network is separated from the Internet by a
firewall. You need to identify the ports that must be opened on the firewall to allow clients from the
Internet to use the following connections:
• Outlook Anywhere
• Outlook Web App (OWA)
• Exchange ActiveSync
• IMAP4 over Secure Sockets Layer (SSL)
Which TCP ports should you identify?

A.
25, 443 and 993

B.
26, 443 and 995

C.
25, 80, 143 and 3269

D.
80, 143, 443 and 389

Explanation: