Forgot about this too. The main Warden Quest has now been corrupted. When a quest is corrupted, it means the enemy has accepted and completed the quest. Corrupted Quests are still available to complete, or "recapture" by completing the new set of mission goals. Corrupted Quests are harder with increased enemy troops, little to no allies, increased enemy armor, attack, and awareness.
QUEST UPDATE: The Warden Order has been compromised by Teryn Cousland. The Order is now considered hostile with the exception of the small handful that were outside of Vigil's Keep. The Corrupted Wardens will attack on sight. Amrathine has fallen, and players will be attacked upon entering. To free the Order, you must purge it or destroy the lich, Kel.