If you want to prevent a guest from checking out on the same day another guest is checking in, you can set this up using Rate Rules.
Use a rule with the “Should Night” condition and apply Stop Sell as the action. This will automatically block availability based on the parameters you define.
To set up a Shoulder Night in Rate Rules:
Go to Pricing > Rate Rules.
Click Add Rate Rule.
Select the Shoulder Night condition.
Decide if you want to affect the night before check-in (pre-stay) or the night after check-out (post-stay).
Choose the action, e.g., set Stop Sell to block bookings for that shoulder night.
Assign the rule to your rates/units and Save.