Troubleshooting: A certificate is already installed error displayed on the Application Server

Issue

When configuring a new application server and the user is installing a new SSL certificate, the message A certificate is already installed is displayed.

Details

When Application Servers are staged, an SSL certificate is installed onto the computer to complete the initial staging. Usually this SSL certificate has an expiry date, but if the SSL certificate has not expired when the new SSL certificate is installed, the message A certificate is already installed is displayed.

Solution

Remove the existing SSL certificate from the Application Server, and then install the new SSL certificate.

To remove the existing SSL certificate

1. On the Application Server, open Internet Explorer.

2. Select Tools > Options.

3. Switch to the Contents tab.

4. In the Certificates area, click Certificates.

5. In the Certificates dialog, switch to the Trusted Root Certification Authorities.

6. Select the SSL certificate to be removed from the list. Click Remove.

7. In the warning dialog, click Yes.

   The old SSL certificate is removed from the Application Server.