# Microsoft Dynamics Customer Engagement [MS Dynamics Customer Engagement](https://docs.microsoft.com/en-us/dynamics365/customerengagement/on-premises/overview?view=op-9-1) is an on-premise Customer Relationship Management \(CRM\) software. ## Sync overview MS Dynamics Customer Engagement runs on [MSSQL](https://docs.microsoft.com/en-us/dynamics365/customerengagement/on-premises/deploy/system-requirements-required-technologies?view=op-9-1) database. You can use the [MSSQL connector](mssql) to sync your MS Dynamics Customer Engagement instance by connecting to the underlying database. :::info Reach out to your service representative or system admin to find the parameters required to connect to the underlying database ::: ### Output schema To understand your MS Dynamics Customer Engagement database schema, see the [Entity Reference documentation](https://docs.microsoft.com/en-us/dynamics365/customerengagement/on-premises/developer/about-entity-reference?view=op-9-1). Otherwise, the schema will be loaded according to the rules of MSSQL connector.