OWA has actually been around since the days of Exchange 5.5. Many of the features
of the regular Outlook program are available to users who utilize the Web-based
application. Given the potentially sensitive information often sent over e-mail, it is
considered a best practice to secure OWA using encryption. Since it is really just a Web
application, using Secure Sockets Layer (SSL) to encrypt connections to OWA is the
most logical way to provide this protection. OWA can be added to the Microsoft
Intelligent Application Gateway (IAG) as a secure Web-based application providing not
only SSL access to OWA, but unifi ed management with other remote access technologies
for an organization through Microsoft Internet Security and Acceleration (ISA) Server.
The Importance
of Securing Outlook Web Access
More and more, users rely on e-mail in today??™s busy world. Unfortunately for many
administrators, users have turned e-mail into a critical fi le storage repository as well
as a preferred method of communication. However, with an inability to function
without e-mail, and with the ever increasingly mobile workforce, administrators have
been forced to provide remote access to e-mail. Numerous protocols exist for providing
this functionality including:
?– Post Offi ce Protocol 3 (POP3)
?– Simple Mail Transfer Protocol (SMTP)
Using Outlook Web Access through the Intelligent Application Gateway ??? Chapter 9 337
?– Internet Message Access Protocol (IMAP)
?– Hypertext Transfer Protocol (HTTP)
Traditionally, POP3 and IMAP have been the most widely used standard protocols
for providing remote mailbox access.
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