How to install an intermediate SSL certificate for a domain in Plesk
- If there is a bundle CA certificate:
Bundle CA certificate should contain all the required intermediate certificates + CA Root certificate.
Upload it as CA certificate according to the article How to install SSL certificate for a domain in Plesk
- If there is intermediate certificate(s) and CA certificate separately:
For example certificates has been signed in the following order:
CONFIG_TEXT: Root CA > Intermediate1 > Intermediate2 > domain certificate.
The content of the certificates should be manually added directly in CA certificate (*-ca.crt) section in Plesk at Tools & Settings > SSL/TLS Certificates > Add SSL/TLS Certificates or in Domains > example.com > SSL/TLS Certificates > Add SSL/TLS Certificates in the following order (domain certificate is not used):
CONFIG_TEXT: Intermediate2, Intermediate1, Root CA