EWS（Exchange Web 服务）出现未经授权的错误

Posted 2023-02-16

【中文标题】EWS（Exchange Web 服务）出现未经授权的错误

【英文标题】：EWS (Exchange Web Service) Getting unAuthorized Error

【发布时间】：2018-12-15 03:15:23

【问题描述】：

我在尝试发送或阅读电子邮件时收到 UnAuthorized(401) 错误

ExchangeService service = new ExchangeService(ExchangeVersion.Exchange2007_SP1);
            service.TraceEnabled = true;
            service.TraceFlags = TraceFlags.All;

            service.Credentials = new WebCredentials("[e-mail]", "XXXXXXXX");
            service.AutodiscoverUrl("[e-mail]", RedirectionUrlValidationCallback);

 EmailMessage email = new EmailMessage(service);
            email.ToRecipients.Add("[e-mail]");
            email.Subject = "Testing from C#";
            email.Body = new MessageBody("This is the first email I've sent by using the EWS Managed API");
            email.Send();

【参考方案1】：

问题很可能是您传递给WebCredentials 的内容 凭据取决于您的 Exchange/Active Directory 的配置方式。

尝试传入格式用户名、密码和域：

service.Credentials = new WebCredentials("username", "password", "domain");

有关更多信息，请参阅WebCredentials Constructors 和 Connecting to EWS