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.
Please find the below links from Kaizala setup to integration with Dynamics 365