The Securly SSL certificate ensures that you are able to filter HTTPs sites correctly. You would need to install the certificates attached at the end of this article to your Internet Explorer for this. The process for importing the certificate is explained here.
To verify if the SSL certificate has been installed
- Navigate to Tools > Internet Options > Content > Certificates
- Scroll through the list of certificates under the 'Trusted Root Certification Authorities' tab for certificate issued to securly.com