When you receive the certificate from VeriSign or another third-party CA, save it to your hard drive. Remember the serial number of this certificate and where you save it.
Right-click the temporary site that you created in step 2, click Properties, click the Directory Security tab, click Server certificate, and then click Next. Follow the wizard. When prompted, select Process the pending request.
After the certificate has been installed, click OK, and then stop and start the Web site.
Right-click the temporary site that you created in step 2, click Properties, click Directory Security, and then click Server certificate.
Select Remove the current certificate and follow the wizard. This removes the certificate from IIS, but the certificate remains in the certificate store.
Right-click the Web site that has the original server certificate installed (that is, the certificate that you are renewing or replacing), click Properties, click Directory Security, click Server certificate, and then select Replace the current certificate.
Select the certificate that you just installed. If you see duplicate certificate names, make sure that you select the certificate that matches the serial number that you noted in step 6.
NOTE: The list of available certificates is populated from the personal certificate store, which is located under Certificates (Local Computer) in the MMC. To view the personal certificate store, add the Certificates snap-in for the Computer Account to your MMC.
NOTE: If IIS does not display the new certificate, you may need to copy it from the personal certificate store that is located under Certificates - Current User in the MMC into the personal certificate store that is located under Certificates (Local Computer). To view the personal certificate store, add the Certificates snap-in for the User Account to your MMC.