Systems, methods, and computer-readable storage media for maintaining consistent globally unique identifiers (GUIDs) for content items accessible via an asynchronous interface in a multi-user network-based content management environment (storage environment). The example content management system can make a content item within a data storage available to an authorized user via the asynchronous interface, and receive, from a client device, content item change information derived from data generated by an operating system function at the client device. Then the content management system can analyze the content item change information to determine a corresponding action at the content management system, and implement the corresponding action on the server side. The content management system can optionally provide a confirmation of the corresponding action to the client device.