Can I specify what happens when a subject comes in outside the visit window or misses the visit window?

A visit without dispensation can always occur outside the visit window. A dispensation visit can occur out of window only if, on the Study Settings tab, you indicate that the kit can be dispensed out of window.

You choose whether to allow dispensation outside the visit window when you define the dispensation schedule. If you do not allow site users to dispense kits outside of window for the visit, a site user cannot complete the visit for a subject who comes in past the window.