On a Docslot diary, it is possible to allocate an appointment to a specific agency, or to allow "any company" to book it.

It is now possible to restrict a certain agency to only book those appointments that have been specifically allocated to them.

To turn this on, go to the "Agency Settings" page and click on the name of the agency you wish to restrict. You'll see a form with a dropdown menu which you can use to turn this feature on and off as you wish.