Importing a trusted CA certificate Functionality is available on the page Settings > Inbound/Outbound > TLS Certificate to import a trusted CA certificate from your network. Steps In the section Trusted CA Certificate for Outgoing Connection, click Import. The Import Trusted CA Certificate dialog box displays. In the Import Trusted CA Certificate dialog box, enter the desired certificate file name or browse to its location in your network. Click OK. The certificate is added to the trusted CA certificate table.