To enhance system security, the UltraVR verifies the validity of device certificates (whether required certificates are imported and whether imported certificates are valid) before communicating with systems or devices (such as FusionSphere components, storage devices, email servers, and remote UltraVR). The UltraVR provides CA certificates of the remote UltraVR and host. You are advised to import CA certificates of devices and replace the default CA certificates of the UltraVR.