Inside of MaidCentral there an option to set employees at the client level as preferred or do not schedule. From the client level of the account click the Employee Preference Tab. Create Preferences and Save.
There is also another layer to indicate if it's a required request. This will be set permanent for recurring bookings in the future and can be updated and changed at any time.
EX. If Ms. Jones has to have Sally come clean her home every visit, MC allows for you set that required employee preference. If Sally is not assigned to Ms. Jones home for a cleaning, a flag will appear on your Job Schedule letting you know that you're doing something that Ms. Jones does not want to have happen.