code: def move_folder(to_folder_id, *sources)
        req = build_soap! do |type, builder|
          if(type == :header)
          else
            builder.nbuild.MoveFolder {
              builder.nbuild.parent.default_namespace = @default_ns
              builder.to_folder_id!(to_folder_id)
              builder.folder_ids!(sources.flatten)
            }
          end
        end
        do_soap_request(req)
      end
docs: Defines a request to move folders in the Exchange store
   @see http://msdn.microsoft.com/en-us/library/aa566202.aspx
   @param [Hash] to_folder_id The target FolderId
     {:id => <myid>, :change_key => <optional ck>}
   @param [Array<Hash>] *sources The source Folders
     {:id => <myid>, :change_key => <optional_ck>},
     {:id => <myid2>, :change_key => <optional_ck>}