c# - Exchange Web 服务 API 和 401 未授权异常

Question

当我尝试使用 EWS API 发送电子邮件时，出现以下错误:(in message.Send();)

The request failed. The remote server returned an error: (401) Unauthorized.

我的代码如下:

ExchangeService exchangeService = new ExchangeService(ExchangeVersion.Exchange2007_SP1);

//WebService Uri
try
{
    exchangeService.Url = new Uri("https://exchangeserver/ews/exchange.asmx");
}
catch (Exception ex)
{
    throw new Exception(string.Format("WebService Uri:" + ex));
}

//Credentials
try
{
    exchangeService.Credentials = new WebCredentials("user@domain", "pwd", "domain");
}
catch (Exception ex)
{
    throw new Exception(string.Format("Credentials:" +  ex));
}

//Send a mail
try
{
    EmailMessage message = new EmailMessage(exchangeService);
    message.Subject = "Test";
    message.Body = "Test";
    message.ToRecipients.Add("destination@domain");
    message.Save();
    message.Send();
}
catch (Exception ex)
{
    throw ex;
}

我阅读了本网站上有关此问题的其他帖子，但它们无法解决我的问题。

Answer 1

尝试改变这个:

 exchangeService.Credentials = new WebCredentials("user@domain", "pwd", "domain");

进入这个:

 exchangeService.Credentials = new WebCredentials("user", "pwd", "domain");

有时，登录凭据取决于 Exchange/Active Directory 的配置方式。 可以是 user@domain 或 domain\user