1. Log in to Sales.
2. If making an exchange, click on Maintenance and search for the Order Number you need to exchange. Otherwise, go to step 3.
3. Click on the Event tab and the correct heading below.
4. In the Start Date, back the date it so it catches the event.
5. Click the event, and, at the bottom of the screen, click Allow Sale.
6. Complete the sale as normal. See Exchanging Tickets or Selling Tickets in AMS for more information.