Go to Settings > Properties and click "Safe Booking Import (No Guest Alert)" for all activated properties
OR
Click "Safe Booking Import" on individual properties.
NOTE:
For imported bookings, ChargeAutomation gives you the ability to select to either automatically send pre checkin links to the guests or not.
Select the appropriate option
On the Bookings page, click on the 3 dots and click "Send Pre Check-in Email" if you would like to do this manually.