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c# - Microsoft.graph API 无法读取电子邮件

问题描述

我正在使用Microsoft.graph API从 office365 帐户读取电子邮件。当我同时阅读多个帐户时，我遇到了一个问题。对于某些帐户，数据会被跳过。

例如，如果 xyx@microsoft.com 帐户的“收件箱”文件夹中包含大约90k封电子邮件，那么在从 API 读取电子邮件时，我们只会收到大约40k封电子邮件。当我们放置多个帐户进行迁移时，会观察到此结果。对于单帐户迁移，它可以正常工作。

ExcMsg  : **Too many concurrent connections opened., Cannot open mailbox.** 
Stack: 
    at Microsoft.Exchange.WebServices.Data.ServiceResponse.InternalThrowIfNecessary(),    
    at Microsoft.Exchange.WebServices.Data.MultiResponseServiceRequest`1.<ExecuteAsync>d__6.MoveNext(),
 --- End of stack trace from previous location where exception was thrown ---,
    at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw(),
    at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task),
    at Microsoft.Exchange.WebServices.Data.ExchangeService.<BindToItem>d__71.MoveNext(), 
--- End of stack trace from previous location where exception was thrown ---,
    at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw(),
    at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task),
    at Microsoft.Exchange.WebServices.Data.ExchangeService.<BindToItem>d__72`1.MoveNext()

if (MessagesList != null && MessagesList.NextPageRequest != null)
    MessagesListRequest = MessagesList.NextPageRequest;

MessagesList = MicrosoftHelper.InvokeApiCall(() =>
    {
         return MessagesListRequest.GetAsync().Result;
    }, this.Context);

where MessagesList  is IMailFolderMessagesCollectionPage

标签： c#microsoft-graph-api

解决方案

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