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Reported by BleepingComputer; we couldn't independently corroborate via other outlets yet — story is recent.

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  • ▲No other credible outlets report the MO1329446 incident or matching details.
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Home/Tech/Microsoft Investigates Teams and Office Web File Access Outage
VERIFIEDBy Xavier Rivera·Monday, June 1, 2026 at 10:58 AM AST·1.5 min read

Microsoft Investigates Teams and Office Web File Access Outage

Microsoft is investigating an ongoing incident that prevents users from opening files in Teams and Office for the web, including Excel. Initial analysis indicates a potential cross-service issue and the outage has been tagged as a critical incident.

Source:BleepingComputer
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Microsoft Investigates Teams and Office Web File Access Outage
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TL;DRAI · 60 sec read

Microsoft investigates an outage preventing users from opening files in Teams and Office for the web. Multiple applications including Excel are affected, and users receive an error that services are unavailable. The company reviews service telemetry to determine the root cause of the potential cross-service problem but has not specified regions or timelines.

Microsoft is investigating an ongoing incident preventing users of its Teams collaboration platform and free Office for the web cloud-based productivity suite from opening files. The company tweeted that it is looking into reports of users unable to open files in Office for the web or Microsoft Teams.
Users may be unable to open files in Office for the web, with impacted Office Apps including but not limited to Excel.
The outage impacts multiple Office web applications. According to further information shared in the admin center under MO1329446, this issue impacts multiple Office Apps, including Microsoft Excel for the web. Users may be unable to open files in Office for the web, with impacted Office Apps including but not limited to Excel.
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Affected users receive a specific error message. When users open documents, impacted users are shown the error message "Office Online services aren't available right now. We're working to restore all services as soon as possible." The disruption affects both the free Office for the web cloud-based productivity suite and the Teams collaboration platform.
In a subsequent update, the company revealed that initial analysis indicates a potential cross-service issue impacting Office for the web experiences.
Microsoft is analyzing service telemetry for the root cause. While it hasn't specified which regions are affected or provided a final timeline for full remediation, the company says it's currently investigating service telemetry to isolate the root cause of the issue. The company has not detailed the full scope of the disruption.
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Initial findings point to cross-service involvement. In a subsequent update, the company revealed that initial analysis indicates a potential cross-service issue impacting Office for the web experiences. Microsoft has also tagged this ongoing outage as an incident, a term commonly used for critical service issues involving noticeable user impact.

EXPERT TAKE

Admins should track MO1329446 in the Microsoft 365 admin center for telemetry updates on the cross-service disruption.

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