It is common to have staff who work in the office or in an indirect way with clients.
For ShiftCare to consider the shift booked so that it turns green a shift does need a staff member and a client assigned to it.
In this situation, you can create a client named "Office", "Admin", after your organisation or something that will make sense to your team.
You are then able to create the shift for your office staff and add the new client to the shift.
You might also consider adding a new shift type of "Office" or "Admin" so it stands out in your schedule.
Additionally, you might want to add a "No Charge" price or rate which will allow you to work out how much the office time costs the business.