Contains date and time information for when a record that is identified in the Record ID field was deleted. When you delete a record, the Record ID field is cleared. When the Connector for Microsoft Dynamics queries for deleted records, it sends information to Microsoft Dynamics CRM about the deletion by using the Integration ID value for the record.
The date and time information that is contained in this field is used in connection with the synchronization data that is integrated with the Connector for Microsoft Dynamics. If a record is synchronized and then deleted from Microsoft Dynamics NAV, then information about the deletion date is stored in this field.