How to set up staff working hours in Microsoft Bookings

In Microsoft 365, select the app launcher, and then select Bookings.
Choose your calendar.
In the navigation pane, select Staff, and then select the staff member whose hours you want to set.
Under Working hours, clear the Use business hours checkbox.
Use the dropdowns to select start and end times for each day. Times are available in 15-minute increments.
Select + to add start- and end-time selectors.
Select Save.

Set an staff's days off

When you schedule a day off for an employee, that employee will appear unavailable on the booking page. Customers using the booking page will be unable to schedule him or her for service on that day.

On the working hours screen, select the x next to the day that the employee will have off.
If you want to schedule a day that was previously marked as a day off, select the + sign next to the day you want to schedule.