In order to be able to use the Exchange button, you will first need to link your account.
Guest accounts cannot use the Exchange menu.
We received additional reports that some users who have already linked their accounts are still unable to use the Exchange menu despite having met all the requirements (Above level 30, not using a guest account, having completed the "How to Use the Exchange Inquiry" quest), so we are re-opening the investigation into this issue.
We are aware of the issue where even after passing level 30 and completing the "How to Use the Exchange Inquiry" quest, the Exchange function does not unlock.
We are currently investigating the cause and we will update this article as soon as we have a fix or update about this issue.
We apologize for the inconvenience and we ask you to hold on to your loot for now!