Regular users can share folders (Secure Folder Sharing) that they own or were granted Share for, but they cannot delegate the power of folder sharing to another user.
Check if You Can Enable Another User to Share Folders
To see if the user you signed-on to MOVEit Transfer with can delegate sharing permissions to other users, from folder view, click the Permissions and Settings button, and look for the Shareattribute.
Settings that Enable You to Extend Folder Sharing to another User