On DeviceLock controlled computer with NetworkLock policies configured, opening a HTTPS site in YandexBrowser gives warning "Your connection is not secure".
Comments
Starting from 17.x versions YandexBrowser stores fingerprints of some default trusted root Certification Authorities (CA). If connection is established using certificate not signed by one of these default CA (e.g. DeviceLock Inc.), the warning "Your connection is not secure" is given.