Board Thread:The Quarters - Q & A/@comment-80.233.37.44-20181022213233/@comment-27659888-20181025052737

Hi the leave button from a quest is currently not available on the website and the app. (Only the abort button if you are the quest owner or party owner).

The good news is you can leave a quest using the Party & Guild Data Tool. Just go to the Quest Participation area and choose leave quest.