This forum used to be called Answer Xchange, so that explained why it is called an answer exchange code.
If you created a user name and password, you can log on to your Community account and click on the icon in the upper right corner. Select Profile and you will get a list of the posts you have made.
**Say "Thanks" by clicking the thumb icon in a post
**Mark the post that answers your question by clicking on "Mark as Best Answer"