Ursa Major Solar (UMS) wants a place within Salesforce to discuss sensitive records.

To facilitate the discussion of "sensitive records" where even the existence of the group must be hidden from non-members, a Chatter Unlisted Group is the appropriate solution. Unlike a Private Group (Option B), which can be seen in searches and lists even if the content is hidden, an Unlisted Group does not appear in search results and requires an explicit invitation to join. This ensures that only members know the forum exists, meeting the highest privacy requirement. Public Groups (Option C) are visible to everyone and are not suitable for sensitive discussions42. "Private Chatter Channel" (Option D) is not a standard term for this type of collaboration group. Unlisted groups must be enabled in Chatter Settings before they can be created by administrators.