Parallels Plesk 9 and SSL certificates signed by an intermediate Certificate Authority (CA)

Parallels Plesk 9 doesn’t seem to like installing certificates signed by an intermediate Certificate Authority (which is becoming more and more common and will be all certificates in the next year or two) through the SSL certificates part of the Plesk interface available to both administrators and end users.

A work around to this seems to be to install the CA bundle (both the root CA and the intermediate CA certificates) together and then install your certificate separately, otherwise you will just receive an error saying that the certificate was not signed by the certificate authority.