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Microsoft Investigating Issue Impacting Exchange Online, Teams, and M365 Suite [Updated]

Microsoft has initiated an investigation into a new service incident affecting multiple core services within the Microsoft 365 ecosystem.

KBy Kyle MercerJan 22, 20261 min read

Microsoft has initiated an investigation into a new service incident affecting multiple core services within the Microsoft 365 ecosystem.

The disruption was acknowledged on Wed, Jan 21, 2026, at 10:15 PM IST, following reports of connectivity issues and service degradation. The affected services include Exchange Online, Microsoft Teams , and the broader Microsoft 365 suite.

Enterprise users may face challenges as Exchange Online and Teams are critical for business communication. Potential issues include intermittent failures, latency, or an inability to sign in.

Microsoft has initiated an investigation into a new service incident affecting multiple core services within the Microsoft 365 ecosystem.
Kyle Mercer · Thehackingpost

As of 10:37 PM IST, Microsoft engineers are in the diagnostic phase with the status listed as "Investigating." The root cause remains unidentified. IT administrators are advised to monitor the Service Health Dashboard for updates.

Update [11:11 PM IST]: Microsoft reported a possible third-party networking issue affecting access to services. Update [11:59 PM IST]: Access issues have been resolved. The incident was related to a third-party network issue, with the Microsoft service environment remaining healthy.

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Based on reporting by Cyber Security News.

AI transparency. This article was produced with the assistance of artificial intelligence and published under human editorial oversight. AI systems can make mistakes. Read how we use AI (EU AI Act, Art. 50).
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