Office 365 Exchange EWS：“访问被拒绝检查凭据并重试过程未能获得正确的属性”

如何解决Office 365 Exchange EWS：“访问被拒绝检查凭据并重试过程未能获得正确的属性”

尝试使用以下代码在共享邮箱中创建约会：

ExchangeService service = new ExchangeService(ExchangeVersion.Exchange2010);
service.Credentials = new WebCredentials("user_id","password");
service.AutodiscoverUrl(user_id,RedirectionUrlValidationCallback); //resolves to https://outlook.office365.com/EWS/Exchange.asmx

Appointment meeting1 = new Appointment(service);
            meeting1.Subject = "subject";
            meeting1.Body = "body";
            meeting1.Start = Convert.ToDateTime("some datetime");

            DateTime end = Convert.ToDateTime("some datetime");
            meeting1.End = end.AddMinutes(Convert.ToInt32("some number"));

ServicePointManager.ServerCertificateValidationCallback = (sender,certificate,chain,sslPolicyErrors) => true;

MailBox test = new MailBox("some email");
FolderId folderid = new FolderId(WellKNownFolderName.Calendar,test);
meeting1.Save(folderid,SendInvitationsMode.SendToAllAndSavecopy);

它返回的错误是：

    Access is denied. Check credentials and try again.,The process Failed to get the correct properties.

我知道凭据是正确的，因为对 AutodiscoverUrl 的调用返回了一个有效的 URL。所以我不知道为什么在调用 save() 时会说“访问被拒绝”？

解决方法

再次回答我自己的问题。

需要向传递的特定用户授予对相关邮箱文件夹的写入权限。