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Microsoft Teams Down – Users Face Messaging Delays and Service Disruptions Worldwide

On Fri, Dec 19, 2025, Microsoft Teams experienced a significant service disruption, affecting numerous users globally. The outage commenced around 2:30 PM ET (7:30 PM GMT), causing issues such as messaging delays, failed message deliveries, and other…

CBy Chloe SimmonsDec 20, 20251 min read

On Fri, Dec 19, 2025, Microsoft Teams experienced a significant service disruption, affecting numerous users globally. The outage commenced around 2:30 PM ET (7:30 PM GMT), causing issues such as messaging delays, failed message deliveries, and other service function impairments.

Microsoft confirmed the incident and initiated an investigation into the root cause. According to their official communications, the company is observing signs of recovery and continues to analyze the impacted scenarios. Administrators are advised to check the Microsoft 365 admin center under incident ID TM1200517 for further updates.

Reports indicate that the outage affected users in regions including the United States, Europe, Australia, and Asia. Users encountered delays in messaging, difficulties in sending files, and general latency issues. The disruption extended beyond Microsoft Teams, impacting other Microsoft 365 services such as Outlook and OneDrive, particularly in Asia.

On Fri, Dec 19, 2025, Microsoft Teams experienced a significant service disruption, affecting numerous users globally.

Chloe Simmons · Thehackingpost

As the investigation proceeds, Microsoft has not yet provided an estimated time for a full resolution. Users are encouraged to monitor the Microsoft 365 status page for the latest updates.

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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