You have two file servers, Server1 and Server2. Server1 hosts a shared folder Data with 10 TB of content. You are decommissioning Server1 and must move Data to a new share on Server2. Requirements: preserve share, file, and folder permissions; after the initial transfer, synchronize changes from \\Server1\Data to the destination without re-copying everything; and minimize administrative effort. Which tool should you use?

Storage Migration Service is the ideal tool because it's designed for migrating servers and their data, shares, and configurations with minimal downtime. It preserves share, file, and folder permissions, and offers an orchestration engine for initial transfer and subsequent synchronization of changes, fulfilling all requirements. Xcopy is a basic command-line utility for copying files; it lacks the synchronization and share migration capabilities needed. Storage Replica is for disaster recovery and high availability by replicating volumes, not for one-time server migrations with share preservation. AzCopy is for copying data to and from Azure Storage, not for on-premises server-to-server migrations.