使用版本 2010 或最新版本时 Exchange AutodiscoverUrl 中的 C# EWS 异常

如何解决使用版本 2010 或最新版本时 Exchange AutodiscoverUrl 中的 C# EWS 异常

a 与 ExchangeVersion.Exchange2007_SP1 成功连接，当我在 2010 年或最新更改它时，我在这一行收到异常：

service.AutodiscoverUrl(MailBoxToAccess,RedirectionUrlValidationCallback); ->System.NullReferenceException: '未将对象引用设置为对象的实例。' 我尝试使用包： Exchange.WebServices.Managed.Api v2.2.1.2 和 Microsoft.Exchange.WebServices v2.2.0

static void Main(string[] args)
        {
            String MailBoxToAccess = "username@domain";
            ExchangeService service = new ExchangeService(ExchangeVersion.Exchange2010);
            SearchFilter sfSearchFilter = new SearchFilter.IsEqualTo(EmailMessageSchema.IsRead,false);

            service.Credentials = new WebCredential("username@domain","password");
            service.AutodiscoverUrl(MailBoxToAccess,RedirectionUrlValidationCallback);

            SetStreamingNotifications(service);
        }

 private static bool RedirectionUrlValidationCallback(string redirectionUrl)
        {
            bool result = false;

            Uri redirectionUri = new Uri(redirectionUrl);
            if (redirectionUri.Scheme == "https")
            {
                result = true;
            }
            return result;
        }

解决方法

我使用

手动设置了 Exchange 服务 URL

/ Create the binding.
ExchangeService service = new ExchangeService();
// Set the credentials for the on-premises server.
service.Credentials = new WebCredentials("user1@contoso.com","password");
// Set the URL.
service.Url = new Uri("https://computername.domain.contoso.com/EWS/Exchange.asmx");

我仍然不明白为什么它对我不起作用

service.AutodiscoverUrl("User1@contoso.com");