Step 1 - Download the Intermediate CA file for your SSL product type:
Note: The correct DigiCert Intermediate CA Certificate must be installed in order for the SSL certificate to work and be fully supported in all web browsers.
Step 2 - Create a Certificate Snap-in:
- From the Web Server, click Start> Run
- Type in MMCand press Enter
- Click Ok
- From the Microsoft Management Console (MMC) menu bar, click File(in IIS 6, IIS 7 & IIS 8) or Console (in IIS 5) > Add/Remove Snap-in
- Click Add
- From the list of snap-ins, Select Certificates
- Click Add
- Select Computer Account
- Click Next
- Select Local Computer(the computer this console is running on)
- Click Finish
- In the snap-in list window, click Close
- In the Add/Remove Snap-in Window, click OK
Step 3 - Install the Intermediate CA:
- From the left pane, expand the 'Intermediate Certification Authorities' folder
- Right-Click on the 'Certificates' folder
- Select All Tasks> Import
- In the Certificate Import Wizard, click Next
- Click Browseand navigate to the Intermediate CA Certificate File
- Click Next
- Select 'Place all certificates in the following store'
- If necessary, browse and select 'Intermediate Certification Authorities'
- Click OK
- Click Next
- Click Finish
- Close the MMC
Note: A restart of IIS is recommended. In some cases a reboot of the server may be necessary in order for the changes to take affect. For IIS 7/7.5, a reboot or re-create of the HTTPS bindings is required in order for the changes to fully propagate.