Event hold_court.8200 can trigger when a vassal has a faith not matching their liege, even if they view each other as righteous (which I think is bad design on Paradox's part, but whatever). The first option has a chance to convert the "infidel" vassal and their family, basically replicating the Demand Conversion character interaction. Since this mod generally blocks demanding conversion between elvish and mannish faiths, I think this event should not trigger when the vassal and liege are man and elf or vice versa. Or at the very least, the first option shouldn't be available in such a case.
Event
hold_court.8200
can trigger when a vassal has a faith not matching their liege, even if they view each other as righteous (which I think is bad design on Paradox's part, but whatever). The first option has a chance to convert the "infidel" vassal and their family, basically replicating the Demand Conversion character interaction. Since this mod generally blocks demanding conversion between elvish and mannish faiths, I think this event should not trigger when the vassal and liege are man and elf or vice versa. Or at the very least, the first option shouldn't be available in such a case.