This document will cover the installation of intermediate Certificate Authority (CA) certificates in IIS and Exchange. If this document does not work with the server, RapidSSL recommends contacting an organization that supports Windows Server.
Step 1 - Download the intermediate certificate. If the order was placed from a RapidSSL Security Center account the intermediate certificate will be delivered along with the server certificate. If the server certificate was installed using a .P7B or .P7S file then the intermediate should have also been installed at that time. To download the intermediate, please use the link below.
Step 2 - Create a Microsoft Management Console (MMC) Certificate Snap-In
Step 3 - Install the RapidSSL Intermediate CA Certificate file
Note: For IIS 6 and below, restart the web server (IIS Admin services) for the changes to propagate. For IIS 7/7.5, a reboot or re-create of the HTTPS bindings is required for the settings to take effect. Please click here for IIS 7 instructions on how to Add an HTTPS binding to a website.
Step 4 - Verify the installation of the certificate chain using the RapidSSL Checker