Appointment Booking Service Configuration is allowing to book more appointments than the specifiedIssue Appointment Booking Service Configuration is allowing to book more appointments than the specified maximum of appointment per booking slot Appointment Booking maximum appointment not workingCauseOutdated business rule "Check appointment is available". This business rule is responsible to grey out the appointment booking slot if it reaches the maximum configured appointment /nav_to.do?uri=sys_script.do?sys_id=5301a79423c523002dd6cb0a56bf6570ResolutionCheck the widget involved in the appointment booking window if customized or outdated. Also check the business rules and the script includes under the package "Appointment Booking" if any were customized or outdated and not upgraded properly. Try to update or revert to the recent out-of-box (OOB) version any customized/outdated scripts. It is recommended to always have the recent OOB version of the scripts.