In a couple of weeks we will introduce the possibility to active/inactive customers and articles. This will be a new property called Active (true/false) on both the customers and articles object.
As default, all customers and articles will be set as Active = true when this functionality is released.
This new functionality will also affect all places where customers and articles can be used. It will only be possible to use active ones.
For example, an error will be thrown if an article is trying to be used on an invoice.