Can an invoice be removed from the dunning cycle?

Yes, if an invoice is currently in a past due status, a great way to remove them from the past due status and out of the dunning cycle would be to edit the invoice's due date. To do this, you'll want to first visit the invoice details page for the past due invoice, then go under Invoice Actions in the top right-hand corner and click on Edit Invoice. From the edit page, you'll want to look on the left-hand side of the page now for a section labeled as Due On which will show the current due date. You'll want to just edit that field and enter a new Due On date set for sometime in the future, this will remove the invoice from its current dunning cycle and past due state.