Microsoft is working to resolve an ongoing outage preventing users from accessing Microsoft 365 services, including Microsoft Teams, Exchange Online, and the admin center.
While Redmond has yet to disclose which regions are currently affected, it currently tracks it on the Service Health Dashboard as an incident, which is commonly used to describe a critical service issue, typically involving noticeable user impact.
Microsoft is also providing up-to-date information regarding this outage on its official Service Health Status page, to provide impacted organizations and customers unable to access the Microsoft 365 admin portal with access to the latest updates.
These ongoing issues are also causing Multi-Factor Authentication (MFA) issues and are affecting users trying to access Microsoft 365 services via Microsoft Entra single sign-on (SSO) authentication.
“Some users attempting to access other Microsoft 365 services, including but not limited to Microsoft Teams and Exchange Online, may be unable to authenticate and access the services. Additionally, users may not receive Multi-Factor Authentication (MFA) messages when attempting to sign in,” the company said in a service alert seen by BleepingComputer.
“Affected users may encounter an error stating ‘We are sorry, something went wrong. Please try refreshing the page in a few minutes. If the problem persists, please visit status.cloud.microsoft for updates regarding known issues.'”
In another update issued 30 minutes ago, Microsoft said that its engineers are working to rebalance a portion of dependent service infrastructure, likely causing a potential directory operations issue, as a “near-term mitigation action to provide relief to affected users.”
In January, Redmond mitigated another MFA outage that was blocking users from accessing Microsoft 365 Office apps. In July, it also resolved an incident preventing Microsoft 365 admins with business or enterprise subscriptions from accessing the admin center.
One month later, users across North America were blocked from using Office.com and the company’s Copilot AI-powered assistant.
Update October 8, 15:44 EDT: Microsoft says that its rebalancing efforts successfully mitigated the Microsoft 365 authentication issues.
“Our analysis identified a portion of directory operations infrastructure which became imbalanced during a period of high traffic volume and caused authorization failures associated with impact,” the company said.
“We’ve successfully rebalanced traffic across the affected infrastructure and confirmed after a period of monitoring that the impact is no longer occurring.”
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