Which TCP ports should you identify?

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