A certificate authority (CA) issues certificates. To initiate secure communications with an external server (for example, a corporate LDAP server), the Viewpoint server must trust the CA that issued the certificate of the external server.
The root certificates of certain standard certificate authorities are pre-installed on the Viewpoint server and certificates issued by them are automatically accepted. However, if a non-standard CA issued the certificate, the root certificate of this CA must be installed on the Viewpoint server for the certificate to be accepted.