Every synchronization task replicates files and folders between two folders. MOVEit Central refers to these two folders as "Folder A" and "Folder B" in its configuration dialogs, previews and logs.
One-way sync tasks always replicate content from Folder A to Folder B. Two-way sync tasks always replicate content from Folder A to Folder B and from Folder B to A. Task-level replication options control this behavior; see the "Synchronization - Options" for more information.