Storage Migration Service is purpose-built to inventory the data, security descriptors, and both share-level and NTFS-level permissions on a source file server such as Fileserver1, transfer that data to a destination server such as Fileserver2, and then perform a cutover that reassigns the source server ' s network identity -- its computer name and IP address -- to the destination server. That cutover step is precisely what allows the existing \\Fileserver1\Data UNC path, already relied upon by the Chicago office application, to continue working unchanged after the migration, since client requests to that path transparently resolve to Fileserver2 once it has taken on Fileserver1 ' s identity. The Microsoft File Server Migration Toolkit and Windows Server Migration Tools are older, largely superseded utilities that can move some file server settings but do not provide this automated inventory-transfer-and-cutover workflow, and neither preserves the source server ' s identity on the destination the way Storage Migration Service does, meaning the UNC path would need to be manually updated or redirected. File Server Resource Manager (FSRM) is a quota, file-screening, and storage-reporting feature entirely unrelated to migrating data between servers. Therefore, Storage Migration Service is the correct tool to perform this migration while preserving the existing UNC path.