Certificate Errors in Outlook
If a pop up box with "Internet Security Warning" appears while sending or receiving in any version of Outlook, click the "View Certificate." If certificate should read "Issued to: exchange.sandiego.edu," it is caused by an older server authentication attached to your account. This error does not affect the performance of the mail box. All you have to do is hit "Yes" to continue using the older certificate and it will continue as normal.
Old Certification: exchange.sandiego.edu
**See Attachment for picture of error and certification.