SUMMARY Currently it's impossible to change the permission on who can read existing message history. It defaults to "members (since invitation)". In order to change it, I have to switch to a different client.
A possibly relevant merge request was started @ https://invent.kde.org/network/neochat/-/merge_requests/658
Git commit 054ad80d30ffc9c48710c8e691e3efc69ed25742 by James Graham. Committed on 25/11/2022 at 16:13. Pushed by nvrwhere into branch 'master'. Add history visibiltiy room setting Add setting for setting the history visibility. Note this setting can only be read not set for Quotient version < 0.7 as there is no event definition for a history visibility state event and it doesn't seem worth creating one when not needed with Quotient 0.7. M +34 -0 src/neochatroom.cpp M +5 -0 src/neochatroom.h M +47 -0 src/qml/RoomSettings/Security.qml https://invent.kde.org/network/neochat/commit/054ad80d30ffc9c48710c8e691e3efc69ed25742