Act II, Ice Wall (over the Ice Temple): After I got the Auril necklace from the frozen Neverwinter soldier, I can open the doors. Opening any door displays a quest message "You found a way to open the ice doors" (or something to that extent) and gives you quest XP. All doors are trapped, so this also fires a projectile at you.
The traps on the doors can be disarmed. However, opening a disarmed door does NOT give the quest message, so I had to leave one door trapped. Opening it completes the quest as normal.
Act II, Ice Wall (over the Ice Temple): After I got the Auril necklace from the frozen Neverwinter soldier, I can open the doors. Opening any door displays a quest message "You found a way to open the ice doors" (or something to that extent) and gives you quest XP. All doors are trapped, so this also fires a projectile at you.
The traps on the doors can be disarmed. However, opening a disarmed door does NOT give the quest message, so I had to leave one door trapped. Opening it completes the quest as normal.