Secrecy depends neither on the medium nor on the urgency
A lawyer's case file lives on several media at once: the case management software, a mailbox, a file-sharing space opened one day to send an oversized document, the personal phone used to reach a client between two hearings, sometimes an automatic transcription service. Each takes in correspondence whose confidentiality is the very substance of the profession. The courses do not restate the principle, they translate it into decisions about channels: which tool receives a court document, what you accept from a client who sends everything through a consumer messaging service, what becomes of a sharing link.