A configuration change caused errors that made Office.com and parts of Microsoft 365 inaccessible beginning around noon UK time. Microsoft acknowledged the outage via social channels, identified the change as contributing to the impact, and pushed a rollback. The company confirmed the reversion completed about an hour later and advised users to refresh browsers. The Microsoft 365 Admin Center reported the incident lasted just over four hours and affected organizations within a specific section of North America infrastructure. Copilot access via m365.cloud.microsoft was affected, with workarounds suggested. Microsoft did not disclose the exact configuration change, raising questions about testing before deployment.
Microsoft had a midweek meltdown on Wednesday as a chunk of its productivity suite fell out of the cloud. The problems kicked off around noon UK time, when users found themselves unable to access Office.com. The company confirmed users' pain via its social media mouthpiece shortly afterwards. A few hours later, Microsoft said: "We've identified a recent change is contributing to impact." It pushed out a rollback.
After another hour or so, the company confirmed that the "reversion" of the change was complete and that the incident had been resolved. It added: "Users may need to refresh their browsers to experience relief." There was a little more detail in the Microsoft 365 Admin Center. According to the console, the incident lasted a little more than four hours and was limited to organizations hosted "within a specific section of affected infrastructure within the North America region."
According to Microsoft, the preliminary root cause was that "a recent configuration change resulted in errors when users attempted to access Office.com, leading to impact." Access to Copilot via m365.cloud.microsoft was also affected, and the company suggested using the Copilot for Microsoft 365 app or other 365 apps (such as Teams and Office) as a workaround. The company has some history when it comes to configuration changes that wreak havoc on its cloud.
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