好的，我现在需要帮用户总结这篇文章的内容，控制在100字以内。首先，我得仔细阅读文章，了解主要信息。 文章主要讲的是微软Exchange Online服务出现了故障，导致用户无法访问邮箱和日历。微软在UTC时间早上6点42分承认了这个问题，并提到多个连接协议受到影响，包括Outlook网页版、桌面版、Exchange ActiveSync等。虽然微软表示问题已经停止发生，但仍有用户报告无法访问邮件。 此外，Office.com的网页也出现了问题，显示错误信息。同时，微软还在调查另一个影响Microsoft 365 Copilot网页登录页面和客户端的故障。建议用户使用桌面应用或其他集成服务。 过去几个月里，微软已经处理过类似的Exchange Online故障，这显示问题可能有重复性。 总结时要抓住关键点：Exchange Online故障、影响范围、Office.com问题、Copilot故障以及微软的应对措施。控制在100字以内，不需要特定的开头。 可能的结构是：微软正在处理Exchange Online故障，影响多个连接方式；Office.com和Copilot也出现问题；用户被建议使用其他方式；过去类似问题频发。 现在把这些信息浓缩成简洁的句子。 </think> Microsoft正在处理Exchange Online服务中断问题，影响Outlook网页版、桌面版及Exchange ActiveSync等多种连接方式。同时，Office.com及Microsoft 365 Copilot相关服务也出现故障。尽管微软称问题已停止发生，但用户仍报告访问困难。 2026-3-16 16:15:18 Author: www.bleepingcomputer.com(查看原文) 阅读量:1 收藏
Microsoft is working to address an ongoing Exchange Online outage that is preventing customers from accessing their mailboxes and calendars.
"We're investigating reports of some users experiencing issues when accessing their Exchange Online mailbox via one or more connection methods," Microsoft said when it acknowledged the issue at 06:42 AM UTC.
As Microsoft explained in a Microsoft 365 admin center update under EX1253275, Outlook on the web, Outlook desktop, Exchange ActiveSync, and other Exchange Online connection protocols are all affected by this outage.
While the company said that "telemetry continues to show the issue is no longer occurring for affected users" and that its engineers are "continuing to monitor service health to assess whether any additional actions are required to ensure sustained recovery," customers are still reporting issues accessing their email.
Right before publishing, the Office.com web portal was down and displayed the message "We are sorry, something went wrong. Please try refreshing the page in a few minutes."
Microsoft is also investigating a separate outage affecting the Microsoft 365 Copilot web sign‑in page and Copilot web clients at office.com/chat and m365.cloud.microsoft, m365.cloud.microsoft/chat, and copilot.cloud.microsoft.
Customers who need to use Microsoft Copilot are advised to use one of the application-based Microsoft Copilot services, including the Microsoft Copilot desktop app, Copilot in Microsoft Teams, or Copilot in Office apps.
"We've identified that a section of service infrastructure is not processing traffic efficiently. We're making configuration changes to remediate impact," the company said in an admin center service alert (MO1253428).
In January, Microsoft mitigated another Exchange Online service outage that intermittently blocked users from accessing their mailboxes via the Internet Mailbox Access Protocol 4 (IMAP4).
Microsoft addressed a similar outage in November that blocked customers' access to Exchange Online emails via the classic Outlook desktop client.
This is a developing story...
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