Is writing about a colleague's problem—without her permission—in order to seek advice and help a dereliction of trust and a sin?

Secrets must be kept and not revealed, especially if their disclosure results in harm; otherwise, the one who reveals them is sinful. If someone confides a matter to another and asks for its concealment, it is forbidden to disclose it to anyone. As for inquiring about her matter in general terms, without it being understood that she is the one intended, we hope there is no harm in that, because jurists have stated that there is no backbiting of an unknown person if the mention does not lead the listeners to understand that a specific person is intended. However, the safer approach is to avoid all of that. A way out of this dilemma might be to seek useful advice from specialized websites.