跟进：微软Microsoft 365全球故障持续，Outlook、Teams等服务大面积中断，部分服务器已恢复
微软（Microsoft）旗下 Microsoft 365 云服务11月12日发生全球性故障，Outlook 电邮、Microsoft Teams 等多项服务大面积中断，故障持续数小时。微软称，一大批服务器未通过自动健康检查、意外掉线，其后受影响服务器上的一个核心进程过载，造成服务容量损失；微软表示，没有迹象显示这次故障由网络攻击造成，也不是流量激增所致。截至周四傍晚，微软尚未宣布故障结束，一部分服务器已经恢复并保持稳定。
用户报告在美东时间中午过后激增。微软在美东时间12时54分首次承认，正在调查美洲地区用户无法通过多种方式访问 Exchange Online 邮箱的问题，其后表示任何地区的用户都可能受到影响。据微软的服务通告，受影响的服务包括 Exchange Online、Microsoft Teams、SharePoint Online、Microsoft 365 Copilot 与 Microsoft Defender XDR，这次事件在微软管理中心登记为 EX1550543 与 MO1550821。
故障监测网站 Downdetector 的数据显示，Outlook 的故障报告在美东时间下午1时左右冲到近13万份的高点，Microsoft 365 的报告峰值超过4.6万份；到下午5时半左右，Outlook 仍有约3.8万份报告。马萨诸塞州政府表示，其电邮等微软服务一度无法使用；澳大利亚国家网络安全协调员办公室表示正在监测这次故障。南加州方面，Culver City 与 Rancho Palos Verdes 两市的市政服务当天也受到波及。
微软说，美东时间下午4时左右，一种替代的健康检查办法让一部分服务器重新上线，公司正在更广范围推行这一办法，并准备用自动化系统持续找出并重启无响应的服务器。下午5时许，微软又表示，先前采取的措施没有带来预期的缓解，受影响服务器上的核心进程过载、导致容量损失，公司正在隔离部分基础设施、重启组件并逐步把流量带回测试。到周四傍晚，微软称一部分受影响服务器已恢复并保持稳定，部分地区出现有限恢复。微软此前已暂停全部部署与配置变更，并把流量转移到其他路径。据科技媒体 The Register 报道，这是 Microsoft 365 今年第二次大范围中断，今年1月的一次故障持续了近10个小时。
微软尚未公布这次故障的完整说明，事件仍在发展中。
关联：全国性微软故障波及南加两市市政服务：Culver City 市政厅服务受扰，Rancho Palos Verdes 市府电邮中断
Follow-Up: Microsoft 365 Outage Continues Worldwide; Outlook, Teams and Other Services Disrupted, Some Servers Back in Service
Microsoft's Microsoft 365 cloud services suffered a worldwide outage on November 12, disrupting Outlook email, Microsoft Teams and several other services for hours. Microsoft said a large number of its servers failed automated health checks and unexpectedly became unavailable, and that a core process on the affected servers later became overwhelmed, causing a loss of capacity. The company said there was no indication the outage was caused by a cyberattack, and that it was not caused by a surge in traffic. As of Thursday evening, Microsoft had not declared the incident over, though a portion of the affected servers had returned to service and remained stable.
User reports surged after noon Eastern. Microsoft first acknowledged the problem at 12:54 p.m. Eastern, saying it was investigating problems reaching Exchange Online mailboxes in the Americas through multiple connection methods, and later said users in any region could be affected. According to Microsoft's service advisory, the affected services include Exchange Online, Microsoft Teams, SharePoint Online, Microsoft 365 Copilot and Microsoft Defender XDR, and the incident is tracked in the Microsoft 365 admin center as EX1550543 and MO1550821.
Data from outage tracker Downdetector showed reports for Outlook peaking at just shy of 130,000 around 1 p.m. Eastern, while reports for Microsoft 365 peaked above 46,000; by about 5:30 p.m. Eastern, roughly 38,000 Outlook reports were still coming in. The Massachusetts state government said its email and other Microsoft services were unavailable, and Australia's National Cyber Security Coordinator said it was monitoring the outage. In Southern California, city services in Culver City and Rancho Palos Verdes were also disrupted during the day.
Microsoft said that around 4 p.m. Eastern, an alternative health-check method had returned a subset of the affected servers to service, that it was applying the method more broadly, and that it was preparing automated systems to continually detect and restart unresponsive servers. Shortly after 5 p.m. Eastern, the company said the steps taken so far had not brought the relief it expected, that a core process on the affected servers was becoming overwhelmed and costing capacity, and that it was isolating part of its infrastructure, restarting components and bringing traffic back to test a possible recovery. By Thursday evening, Microsoft said a portion of the affected servers had returned to service and were remaining stable, with limited recovery in some regions. The company had earlier paused all deployments and configuration changes and shifted traffic to alternative pathways. According to The Register, this is Microsoft 365's second major outage of 2026; one in January lasted almost 10 hours.
Microsoft has not yet published a full account of the outage, and the incident is still developing.
来源：微软
发布：GSM·美国（发布链接）
图片来源：图：微软位于华盛顿州 Redmond 的总部西园区航拍。Jelson25 摄，公共领域，Wikimedia Commons。 / Photo: Aerial view of the West Campus of Microsoft's headquarters in Redmond, Washington. Photo by Jelson25, public domain, via Wikimedia Commons.
GSM Global · 本篇英文版 English edition of this story
- 2026-11-12 12:36全国性微软故障波及南加两市市政服务：Culver City 市政厅服务受扰，Rancho Palos Verdes 市府电邮中断
- 2026-11-12 16:14跟进：微软Microsoft 365全球故障持续，Outlook、Teams等服务大面积中断，部分服务器已恢复本篇
