You can examine the certificate of any secure web page by clicking, or double-clicking, on the padlock icon on the status bar of your browser. The certificate for this page, for example, shows that it was issued to certs.cac.washington.edu, the service's domain name, and was issued by Thawte Server CA.
The University of Washington issues certificates to many of the web services at the university. In order for you to easily use those services, you must tell your browser or email program to accept certificates issued by the UW. Do that by clicking on the install button.
HELPER
Install the UW Server CA Certificate