Default restrictions for Booking Engine can be set in Property Settings / Booking Engine / Settings:
Default Restrictions are:
- Minimum Stay
- Maximum Stay
- Max # Guests
- Cut Off policy - more information here
If you set these restrictions on Availability and Rate Calendar, it will overwrite default settings in Booking Engine Settings. It gives you a possibility to use the default, for example, Minimum Stay restriction (2 days) for all rooms and dates in Booking Engine, and to change it in the calendar to other value for selected days and rooms only.