Understanding OWA Security Features

Outlook Web Access has several enhancements for security, including support for S/MIME attachments, spam beacon blocking, attachment blocking, cookie authentication, and clearing user credentials during the logoff process.

S/MIME: Sending and Receiving Digitally Signed and Encrypted Messages

OWA 2003 now supports S/MIME functionality, giving you the ability to send and receive digitally signed messages using encryption. However, an ActiveX control must be loaded on each client. To download the ActiveX component manually, go to the OWA Options page. Configuration and loading of the S/MIME functionality was covered in the section “Email Security,” earlier in the chapter.