Troubleshooting Tip: 'The highlighted Subject and Issuer values do not match' message when uploading a SSL cert to FortiClient EMS

When uploading an SSL cert to FortiClient EMS, it may display a message stating 'The highlighted Subject and Issuer values do not match. Please ensure the certificate chain is valid.':

Note that this is just an informative message: it does not indicate there is any actual error on the SSL certificate.

To verify if the certificate chain is valid, access the FortiClient EMS FQDN in web browser, then select the lock icon:

If it shows 'Certificate is valid', the SSL certificate can be used.

If there are errors in the verification above, engage the certificate provider to fix it.

After verifying the uploaded SSL certificate is valid, it can be used on FortiClient EMS as a [Webserver certificate] and [Endpoint Control certificate]. Ensure that there is only one FQDN in the [Use FQDN] field.