Offer a feature to indicate that the appointment max for a particular date has been reached. For example, let's say a therapist has a daily calendar availability ranging for 10 hours on a given day. However the Therapist only wants to see a maximum of 8 clients per day. Once that daily max is reached, the system will require an override to book additional appointments on that day. This way, if clients are booking via the client portal, they will not be allowed to book an appointment on a day where the max has been reached.
Have full control over your schedule by setting a max number of appointments each day. After the limit has been reached, clients will not be able to request an appointment for that day.
have a hard limit on number of clients who can schedule per day/week ect through the client portal. this way a therapist can set a 20 client limit per week or a 6 client per day limit.