Microsoft Outlook is down: Here’s what we know so far

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Microsoft has warned users that they may not be able to send, receive, or search for email in the service due to “recent changes”.

Microsoft acknowledged the service issues on Tuesday at 4:04 a.m. UTC and noted that it affected users in North America and other “additional regions”. The problem itself was caused by a glitch affecting Microsoft’s infrastructure in North America. It didn’t clarify which additional areas were affected, but noted in an update that the Calendar app protocol interface used by Microsoft Teams and other services was also affected.

“Current Status: Users in other regions outside of North America may experience some residual impact due to affected portions of infrastructure in North America. We are already starting to see an improvement. Gradual improvement from this issue for users in some of the other affected areas.We’re continuing to perform targeted restart operations on primarily impacted infrastructure in North America. US to restore service availability,” Microsoft reported at 08:43 UTC on its service status page.

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Microsoft Twitter account @MSFT365Status report that a “recent change” contributed to the service disruption. It did not clarify what changes it was referring to.

“We have confirmed that a recent change is contributing to the impact. We are working on potential solutions to restore service availability. Refer to EX512238 or for more details,” it noted.

“Our targeted resources are progressing, and we’ve seen a slight improvement in some environments. Additionally, we’re exploring additional steps to accelerate resolution. details are available via EX512238 in the admin center or,” It said in a later update.

The current outage to comes after one multi-hour power outage globally at the end of January impacted several Microsoft cloud services, including Microsoft Teams, Exchange Online, Outlook, SharePoint Online, OneDrive for Business, Microsoft Graph, Power BI, M365 Admin Portal, Microsoft Intune, Microsoft Defender for Cloud Apps and Microsoft Defender for Identity.

Company said in a preliminary post-incident assessment that “a change was made to Microsoft’s Wide Area Network (WAN) that affected connectivity between internet clients with Azure, inter-regional connectivity, and connectivity between facilities through ExpressRoute.”

The outage occurred after a command was issued to one of its routers in the WAN causing the router to send a message to all other rounders in the WAN to recalculate its IP table. they. The specific command has not been reviewed by engineers before implementation.

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Microsoft plans to publish the final post-outage assessment report in January in mid-February.


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