After you select a migration type and select the items to be migrated (you have copied them from the Source eDir Tree panel into the Destination Zone panel to complete your modeling of the migration type), click this button to perform the migration. All of the items listed on the Items to Migrate tab are migrated one at a time. They are displayed with dimmed icons until they are migrated.
If you drag a site listed application that has a duplicate already queued, you are asked to resolve them during queueing by selecting which one to migrate. You can right-click an item and select View attributes for information that might help you in determining which item to migrate.