Importing Trusted CA Certificates
When a controller receives a server's certificate, it matchs the server's CA against the list of trusted CAs it has. If there is no match, the controller sends an error.
To import a CA certificate:
    - From the application select, System > Certificates > Trusted CA Certs (Chain).
 - Click Import, the Import CA Certs (Chain) form appears.
 - Enter a Name.
 - Enter a Description of the certificate.
 - For Intermediate CA Certificates, click Browse and select the file. If you need to upload additional intermediate CA certificates to establish a chain of trust to the signed certificate, you can select up to four certificates.
 - For Root CA Certificate, click Browse and select the file.
 - Click OK.
 
NOTE
 You can also edit or delete a CA certificate by selecting the options Configure or
        Delete respectively.