Get attachment files from exchange emails in SSIS -

i have client send everyday email attachment files process it. have script task doesn't work, script connect account through webmail when script try read inbox folder error. in specific line: finditemsresults results = service.finditems(wellknownfoldername.inbox, querystring, view);

using system; using system.collections.generic; using system.linq; using system.threading.tasks; using system.windows.forms; using system.io; using microsoft.exchange.webservices.data;  namespace testmailattachment {     static class program     {         /// <summary>         /// main entry point application.         /// </summary>         [stathread]         static void main()         {             exchangeservice service = new exchangeservice();             service.credentials = new webcredentials("user", "pass", "domain");             /*service.url = new uri("https://webmail.domain.es/owa/");*/             service.autodiscoverurl("birep@domain.es");              getattachments(service);          }         private static void getattachments(exchangeservice service)         {             // return single item.             itemview view = new itemview(1);              string querystring = "hasattachments:true subject:'message attachments' kind:email";             //console.writeline("check test");             // find first email message in inbox has attachments. results in finditem operation call ews.             finditemsresults<item> results = service.finditems(wellknownfoldername.inbox, querystring, view);              if (results.totalcount > 0)             {                 emailmessage email = results.items[0] emailmessage;                  // request attachments on email message. results in getitem operation call ews.                 email.load(new propertyset(emailmessageschema.attachments));                  foreach (attachment attachment in email.attachments)                 {                     if (attachment fileattachment)                     {                         fileattachment fileattachment = attachment fileattachment;                          // load file attachment memory. gives access attachment content,                          // byte array can use attach file item. results in getattachment operation                         // call ews.                         fileattachment.load();                         //console.writeline("load file attachment name = " + fileattachment.name);                          // load attachment contents file. results in getattachment operation call ews.                         fileattachment.load("\\\\server\\folder" + fileattachment.name);                          // put attachment contents stream.                         using (filestream thestream = new filestream("c:\\temp\\stream_" + fileattachment.name, filemode.openorcreate, fileaccess.readwrite))                         {                             //this results in getattachment operation call ews.                             fileattachment.load(thestream);                         }                     }                     else // attachment item attachment.                     {                         itemattachment itemattachment = attachment itemattachment;                          // load item attachment properties. results in getattachment operation call ews.                         itemattachment.load();                         //console.writeline("loaded item attachment subject = " + itemattachment.item.subject);                     }                 }             }         }     } } 

also don´t know how do, script take emails specific person or subject.

thanks in advance.