def export_items(ids)
      validate_version(VERSION_2010_SP1)
      ids = ids.clone
      [:item_ids].each do |k|
        validate_param(ids, k, true)
      end
      req = build_soap! do |type, builder|
        if(type == :header)
        else
      builder.export_item_ids!(ids[:item_ids])
        end
      end
      do_soap_request(req, response_class: EwsResponse)
    end
def export_items(ids)
      validate_version(VERSION_2010_SP1)
      ids = ids.clone
      [:item_ids].each do |k|
        validate_param(ids, k, true)
      end
      req = build_soap! do |type, builder|
        if(type == :header)
        else
      builder.export_item_ids!(ids[:item_ids])
        end
      end
      do_soap_request(req, response_class: EwsResponse)
    end
Export items as a base64 string
 @see http://msdn.microsoft.com/en-us/library/ff709503(v=exchg.140).aspx

 (Requires Exchange version equal or newer than VERSION 2010 SP 1)

 @param ids [Array] array of item ids. Can also be a single id value