Configuring the SC server certificate as an additional certificate is not recommended because BACnet devices may not include an SNI header. You can configure additional server certificates in the WebService to be presented to browser connections using the AdditionalHttpsCerts component from the web palette. The certificates presented to browsers are signed by a CA certificate in the browser's System Trust Store.

Main Https Cert drop-down list and click Save.Subject Alternate Names property in these additional certificates is configured to present the certificates to browser connections based on an SNI
header in the browser's connection request.