Error 403 when calling APIs of Office365 with authentication of AzureAD

I'm making a web application to call Office365 REST API, and is using the authentication function of Azure AD. I am not having any progress since last week, and we suddenly got this error:

statuscode: 403,
body: '{"error":{"code":"ErrorAccessDenied","message":"Access is denied. Check credentials and try again."}}

Here is the request that I sent

Source code:

var request = {
    url: url,
    method: method,
    json: (method === constants.GET || method === constants.DELETE) ? null : resource,
    headers: {
        'Authorization': credentials.tokenType + ' ' + credentials.accessToken,
        'User-Agent': clientId,
        'Accept' : 'application/json'
}

Real data:

{ url: 'https://outlook.office365.com/api/v1.0/me/folders/'AAMkADRh.....HHKAAAAAAEKAAA='/messages?%24filter=HasAttachments%20eq%20true%20and%20DateTimeSent%20ge%202014-11-13T07%3A03%3A40.924Z&%24select=Body%2CIsDeliveryReceiptRequested',
  method: 'GET',
  json: null,
  headers: 
   { Authorization: 'Bearer eyJ0eXAiOiJKV1QiLCJhbGciOi.....53W5K14rv4BzSHz43ow',
     'User-Agent': '22cd7677-41ac-49f9-9147-765416532cd7',
     Accept: 'application/json' } }

Could anyone explain how to fix this?