Work spaces within entrance vestibule

We are working on a project with two main entrances. Both include vestibules. Within one of the entrance vestibules, the owner needs to include a couple work spaces: a security desk, a cashier´s desk and clerk´s desk. The security desk is open within the vestibule. The cashier´s and clerk´s desks are within very small enclosed offices included inside the vestibule and include a window for transactions facing the vestibule, and an office door that connects the offices to the rest of the building (interior spaces). The vestibule itself is completely enclosed and includes two sets of doors to the outside, and one main set of doors into the building, with one additional smaller service door. It also includes within the vestibule an elevator. The question is whether it is ok to include the security desk and the cashier´s / clerk´s offices within the vestibule, with transaction windows for public use. Thanks.