Samsung Knox and AT&T's failure to deliver

The Galaxy S4 is supposed to come with Samsung Knox, a security suite that helps to keep your device safe.  Every single carrier, minus AT&T, has a very simply way to enable this.  However, on AT&T, it is near impossible to enable.  This feature alone would be why large corporations would choose an iPhone over a Galaxy S4.  If AT&T isn't going to release this feature, they are essentially forcing their biggest customers to purchase iPhones.  [Edited to comply with Guidelines].

AT&T, how do you enable Samsung Knox?