Technology for analyzing and tracking states of a directory service by correlating changes from multiple different data sources related to the directory service. A first data source may be based on synchronization data of the directory service and a second data source may be based on security data of one or more domain controllers hosting the directory service. The synchronization data and security data may both correspond to changes to the directory service but may include different information. For example, synchronization data may provide the content of a modification to the directory service and the security data may provide an entity that initiated the modification. The multiple sources may be used to generate and enrich modification data of the directory service. The modification data may be used to determine a prior state of the directory service, to undue modifications initiated by a particular user, or to detect malicious activity.