How license keys module behaves when there is no key in stock?

I wonder how your module to send license keys works when someone purchase a license when there is no license keys in stock? Will it handle the process well or i will have to manually send cdkey to customer via my email client?

Hello
When there is no key in stock:
- module sends email to customer with information that there is no key in stock to deliver and informs customer that should get contact with shop owner

You can as a shop owner deliver purchased key to customer in two ways:

1. you can manually add key to order with usage of this form: 
   • you can do it under: cdkeys manager > used cdkeys > add new:
     
   • then once you will add key to order, you can use "send email" button. Thanks to this module will send an email with cdkey to customer.
     
2. you can refill keys in "group" of cdkeys 
   • you can add keys to group of cdkeys that is empty:
      
   • then go to order detail page and switch order status to "send cdkey again":
     
     (or any other status that is permitted to receive cdkey - you can set order states permitted to receive cdkey on module configuration page)

best regards
milos