通过ews发送简单的电子邮件可以正常工作-从我的帐户到我的帐户：
ExchangeService ews = new ExchangeService(ExchangeVersion.Exchange2010);
ews.AutodiscoverUrl("[email protected]");
EmailMessage email = new EmailMessage(ews);
email.ToRecipients.Add("[email protected]");
email.Subject = "HelloWorld";
email.Body = new MessageBody("This is the first email I've sent by using the EWS Managed API");
email.Send();
只需尝试模拟，它也可以按预期方式工作-在最后一行中，它返回不允许模拟的错误：
ExchangeService ews = new ExchangeService(ExchangeVersion.Exchange2010);
ews.AutodiscoverUrl("[email protected]");
ews.ImpersonatedUserId = new ImpersonatedUserId(ConnectingIdType.SmtpAddress, "[email protected]");
EmailMessage email = new EmailMessage(ews);
email.ToRecipients.Add("[email protected]");
email.Subject = "HelloWorld";
email.Body = new MessageBody("This is the first email I've sent by using the EWS Managed API");
email.Send();
现在，我尝试使用我的应用程序服务帐户登录：
ExchangeService ews = new ExchangeService(ExchangeVersion.Exchange2010);
ews.Credentials = new NetworkCredential("service", "1234", "mydomain.com");
//ews.Credentials = new WebCredentials("service", "1234");
ews.AutodiscoverUrl("[email protected]");
//ews.AutodiscoverUrl("[email protected]");
ews.ImpersonatedUserId = new ImpersonatedUserId(ConnectingIdType.SmtpAddress, "[email protected]");
EmailMessage email = new EmailMessage(ews);
email.ToRecipients.Add("[email protected]");
email.Subject = "HelloWorld";
email.Body = new MessageBody("This is the first email I've sent by using the EWS Managed API");
email.Send();
但是，这会在自动发现行中引发错误：“ AutodiscoverLocalException：找不到自动发现服务。”
该服务帐户已在AD和Exchange中设置，并带有正确的密码和smtp地址。
为什么不起作用？如何检查导致该错误的原因？
我解决了问题，然后猜出了问题所在：这是用户帐户。
EWS使用给定的凭据进行身份验证以访问以下位置的自动发现服务：
http://mydomain/AutoDiscover/AutoDiscover.xml
凭据是正确的，但是对于设置为“用户必须在首次登录时更改密码”的帐户，似乎拒绝了对自动发现服务的访问。我在AD中更改了该设置，现在可以使用了。
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