Which feature ensures that a new server takes on the identity of an old server during migration?

The feature that ensures a new server takes on the identity of an old server during migration is the Storage Migration Service. This service is specifically designed to facilitate the migration of servers and their associated data to new hardware or virtual environments while preserving the configuration, user settings, and file shares of the original server.

The Storage Migration Service provides a streamlined approach to handle complex migration tasks, including transferring server roles, settings, and even the identity of the original server. By using this service, administrators can minimize downtime, maintain the same network identity for users, and ensure a smooth transition between old and new systems. It automates several aspects of the migration process, allowing for a more efficient and less error-prone transition compared to manual methods.

In contrast, file synchronization primarily focuses on keeping files consistent across multiple devices but does not address the broader aspects of server identity migration. Cloud backup solutions are mainly for disaster recovery and data protection rather than migration purposes. Windows Storage Server is a specialized operating system for file and storage services but does not specifically handle the migration of server identities. Thus, the Storage Migration Service is the clear choice for this task.