Installing the Root & Intermediate Certificates:

You can download the files you will need for this from the support section of the website Root & Intermediate Certificates Save these Certificates to the desktop of the webserver machine, then:

Click the Start Button, select Run, type mmc and select OK

Select Run

Click File and select Add/Remove Snap in

Select Add/Remove Snap in

Select Add

Select Add

Select Certificates from the Add Standalone Snap-in box and click Add

Select Certificates Add Standalone Snap-in

Select Computer Account (NOTE: This step is very important. It must be the computer account and no other account) and click Next

Select Local Computer and select Finish

Select Local Computer and select Finish

Close the Add Standalone Snap-in box, click OK in the Add/Remove Snap in
Return to the MMC
To install the your Root Certificate:

Install Root certificate

Right click the Trusted Root Certification Authorities, select All Tasks, then select Import.

Certificate Import Wizard

Click Next.

Certificate Import Wizard

Locate the Root Certificate and click Next.

When the wizard is completed, click Finish.

To install the Intermediate Certificate/Certificates:

Install Intermediate Certification Authorities

Right click the Intermediate Certification Authorities, select All Tasks, select Import.

Complete the import wizard again, but this time locating the intermediate Certificate when prompted for the Certificate file.

(note you will need to repeat this step for all the intermediate certificates that are sent to you.)

Ensure that the Root certificate appears under Trusted Root Certification Authorities

Ensure that the intermediate certificate / certificates appears under Intermediate Certification Authorities

Once these are installed you may need to restart the server.

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