Within the Calendar Module, we can create events and invite people to participate. In Odoo, we can remind attendees about the event via email, text message, or even directly from Odoo. With the following guide, you'll learn how to set a reminder via WhatsApp message and thus be able to notify attendees through this means: 

English Version: 

https://docs.google.com/document/d/1IpTQBfUDq337RwnVn3B_8rruVDXngCG3u6IBVHhCnUM/edit?usp=sharing

Spanish Version: 
https://docs.google.com/document/d/12cf7emO6zBDf4hquqYsMe2rxi_1wfj-PTpZpomP_-ps/edit?usp=sharing