The cron that checks the event for the automatic email “Send reminder email!” has the name:

setup_wpestate_full_invoice_payment_reminder

The cron runs daily and sends 1 automatic email to users who have a confirmed booking that starts 3 days before the current day.

There is a maximum limit of 3 emails that can be sent (1 automatic and 2 manual)

The cron details are set in the file:

wprentals/libs/events.php

The time (3 days before check in) is edited from below formula (change 3 to your value)

To change the number of emails that are allowed to be sent (3 is maxed right now) change the “3” value in code:

sent_no<3