The security certificates used on our sites are issued from DoD certificate
authorities. The Root CA and Intermediate CA certificates for the DoD are not
typically loaded on a normal installation of the Internet Explorer browser.
This is more than likely the cause of the error you are receiving.
Please click the link below and follow the directions on installing
the DOD root certs. Once you have completed, please close your
internet browser and try again.
https://militarycac.com/dodcerts.htm
Instructions for non CAC card users