To ensure open files are copied when migrating files from one Exchange server to another, which service is beneficial?

The Storage Migration Service is specifically designed to help organizations seamlessly migrate their data and applications while ensuring minimized disruption. When migrating files from one Exchange server to another, this service is beneficial as it offers capabilities to handle open files efficiently. It allows you to replicate file shares from source servers to destination servers while ensuring that any files that are currently open or in use are appropriately taken care of during the migration process. This is crucial in environments like Exchange, where data integrity and continuity are essential.

In contrast, other options do not cater specifically to the requirements of migrating Exchange server data. For instance, AWS Migration Hub focuses on managing and tracking migrations to AWS, while Azure Data Box is primarily a physical device for transferring large amounts of data into Azure storage solutions. RoboCopy, while a powerful file-copying tool, does not inherently support the complexities involved in migrating applications like Exchange, especially regarding handling open files effectively during the migration. Thus, the Storage Migration Service stands out as the most suitable choice for this scenario.