Certificate Export Help for Internet Explorer
From the Tools menu, select Internet Options
Select the "Content" tab
Click the "Certificates" button
Select the certificate to export
Click the "Export" button
Click the "Next" button
Select the "No, do not export the private key" radio button
Click the "Next" button
Select the "DER encoded binary X.509 (.CER)" radio button
Click the "Next" button
Enter a path and file name to store the certificate
Click the "Next" button
Click the "Finish" button
Click the Ok button after the export is successful
Validate a certificate