Install the GlobalSign Intermediate root CA certificates on your web server
ExtendedSSL customers must install your end entity ExtendedSSL Certificate and BOTH the Extended Validation CA Certificate and Cross Certificate onto your web server. Your ExtendedSSL Certificate is sent to you by email. Copy and Save the below certificate to your web server and follow the Installation Instructions appropriate for your web server type.
Copy and Past ALL characters within each of the the below boxes (including the -----BEGIN CERTIFICATE----- and -----END CERTIFICATE-----) into a text editor and Save each file to your web server.