我正在创建一个Outlook加载项，并且试图通过该加载项将文档附加到撰写电子邮件中。我正在使用addFileAttachmentAsync（）方法。这是我的代码：
Office.context.mailbox.item.addFileAttachmentAsync(
url,
docName,
function (asyncResult) {
if (asyncResult.status == Office.AsyncResultStatus.Succeeded) {
// Get the ID of the attached file.
var attachmentID = asyncResult.value;
}
});
此调用的结果成功，因为我可以获取结果的附件ID。
但是，即时通讯无法打开附件。例如，当尝试打开docx文档时，出现错误Word found unreadable content in _____.
同样在Chrome浏览器中，我收到错误Sorry, we ran into a problem while opening this document.
运行代码时没有任何错误，但是打开文件时出现错误：
Access to XMLHttpRequest at https://browser.pipe.aria.microsoft.com/ping from origin https://euc-word-view.officeapps.live.com has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource.