Microsoft responds to Microsoft 365 problems affecting email, Teams, and OneDrive

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Microsoft responds to Microsoft 365 problems affecting email, Teams, and OneDrive

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Thousands of Microsoft enterprise customers reported problems accessing their email as they returned from the weekend, and on Monday afternoon, Microsoft acknowledged widespread problems affecting Exchange Online and other Microsoft 365 business services.

Initially, users took to social media and platforms like DownDetector to report problems with Microsoft Outlook, the widely used email service. However, the issue appears to be much more widespread. In a statement shared to X at 12:01 p.m. ET, Microsoft confirmed that service to Exchange Online had been disrupted. (Exchange Online is a cloud-based enterprise service “that delivers email, calendar, contacts, and tasks.”)

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In addition, a Microsoft spokesperson provided the following statement to Mashable via email: “We’re aware of an issue affecting access to Exchange Online and some other services. We know this is disruptive for customers and we appreciate their patience while we work to restore services as quickly as possible.”

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On its official status page, Microsoft elaborated on what other services were impacted by the outage. The status page reported “Service degradation” for Microsoft 365 Business or Enterprise, with the problems affecting services such as:

OneDrive for Business
SharePoint Online
Exchange Online
Microsoft Teams
Microsoft Purview
Microsoft Defender XDR
Microsoft 365 Admin Center

Microsoft says the root cause of the outage is an “issue within a core authentication configuration used by multiple Microsoft 365 services,” and the company is actively testing a remediation strategy.

Microsoft 365 admins can see MO1465074 and/or EX1464935 for the latest updates on the disruption — if they can access the Admin Center.

Microsoft provided its most recent update on the situation at 6:01 p.m. ET, writing that it’s “continuing to review recent changes to the service to definitively confirm the source of the problem.”