We are mostly acquainted with What’s app but we rarely use the app released by Microsoft which is a secure chat platform.
Microsoft Kaizala is a mobile messaging (chat) app for large group communications and work management for modern workplace which enables organizations to communicate efficiently and securely with their Firstline Workforce, the value-chain outside the organization, and even their customers. It facilitates secure large group communication & discussion, message broadcast, work management, and complaint redressal, leading to better information flow and higher productivity. Please refer below link for more information.
https://www.microsoft.com/en-us/garage/wall-of-fame/microsoft-kaizala/
Please find the below links from Kaizala setup to integration with Dynamics 365
GM Dynamics Consulting 