You can configure a Horizon Client setting to select a local certificate, or the certificate on a smart card, when you connect to a server. If you do not configure this setting, you must manually select a certificate.
Prerequisites
For your setting to take effect, a Horizon administrator must configure smart card authentication on the server and only one certificate must be available on your client system or smart card.
If you have multiple certificates, Horizon Client always prompts you to select a certificate, regardless of how you configure this setting.