Dynamics 365 customer engagement (formerly known as Microsoft Dynamics CRM) refers to the complete customer-driven package comprising modules like sales, customer service, marketing, field service, and project service automation. It is a suite of applications designed to help businesses manage and improve their interactions with customers. It's part of the broader Microsoft Dynamics 365 ecosystem, which integrates CRM (Customer Relationship Management) capabilities with other business processes. Dynamics 365 Customer Engagement is designed to be flexible and scalable, making it suitable for a wide range of industries and business sizes.