I read your email again,
And I do not see that option, I just see the options in the image below:
Perhaps I am missing some configuration or that is not part of ATG10.0.3
I think the functionality you are looking for can be served using the serialized coupon codes introduced in 10.1, using which you can generate batches of limited-use coupon codes and restrict their usage limits. But in 10.03 I guess you would have to customize few things in order to achieve something similar.