Microsoft 365 applications access outage
Service Disruption
Summary
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Microsoft is investigating an ongoing Microsoft 365 outage that is blocking some customers from reaching Microsoft 365 applications. The disruption was first acknowledged at 05:06 AM UTC on Monday and matters because it is interrupting access for affected users while Microsoft works to restore service.
Related Happenings
Microsoft Windows 365 Office installation disruption
Service Disruption
First: 13.05.2026 14:53
Last: 13.05.2026 14:53
Sources 1
About this happening:
The **Windows 365** service update has introduced a **configuration change** that is blocking **Office downloads and installs** for some customers, disrupting access on cloud PCs....
Microsoft Windows 365 Office installation disruption
Service DisruptionAbout this happening: The **Windows 365** service update has introduced a **configuration change** that is blocking **Office downloads and installs** for some customers, disrupting access on cloud PCs....
Microsoft Outlook.com outage causing sign-in failures
Service Disruption
First: 27.04.2026 15:03
Last: 27.04.2026 15:03
Sources 1
About this happening:
Microsoft's **Outlook.com** is experiencing an **ongoing outage** that is blocking sign-ins and mailbox access, leaving some customers unable to use email normally. The disruption...
Microsoft Outlook.com outage causing sign-in failures
Service DisruptionAbout this happening: Microsoft's **Outlook.com** is experiencing an **ongoing outage** that is blocking sign-ins and mailbox access, leaving some customers unable to use email normally. The disruption...
Microsoft Teams desktop client launch failure from service update regression
Service Disruption
First: 20.04.2026 12:40
Last: 20.04.2026 12:40
Sources 1
About this happening:
Microsoft reverted a **service update** after it left some **Microsoft Teams desktop client** users unable to launch the app, disrupting access and leaving affected clients on the...
Microsoft Teams desktop client launch failure from service update regression
Service DisruptionAbout this happening: Microsoft reverted a **service update** after it left some **Microsoft Teams desktop client** users unable to launch the app, disrupting access and leaving affected clients on the...
Microsoft Windows Hardware Program developer account suspensions
Service Disruption
First: 09.04.2026 09:46
Last: 09.04.2026 09:46
Sources 1
About this happening:
Microsoft suspended **Windows Hardware Program** developer accounts after **mandatory verification** failures, blocking submissions and delaying **Windows builds** and **security...
Microsoft Windows Hardware Program developer account suspensions
Service DisruptionAbout this happening: Microsoft suspended **Windows Hardware Program** developer accounts after **mandatory verification** failures, blocking submissions and delaying **Windows builds** and **security...
Microsoft classic Outlook Gmail and Yahoo sync disruption
Service Disruption
First: 24.03.2026 17:12
Last: 24.03.2026 17:12
Sources 1
About this happening:
The **classic Outlook** synchronization failure affecting **Gmail** and **Yahoo** accounts has been fixed, restoring email access for impacted users. Microsoft said the bug produc...
Microsoft classic Outlook Gmail and Yahoo sync disruption
Service DisruptionAbout this happening: The **classic Outlook** synchronization failure affecting **Gmail** and **Yahoo** accounts has been fixed, restoring email access for impacted users. Microsoft said the bug produc...
Timeline
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13.10.2025 12:00 2 articles · 7mo ago
Microsoft reviews telemetry and recent service changes
Technical Analysis UpdateAt 09:00 UTC, Microsoft says it is continuing to analyze service telemetry alongside recent changes made to the service to identify the root cause and define a path to resolution.
Show sources
- Microsoft investigates outage affecting Microsoft 365 apps — www.bleepingcomputer.com — 13.10.2025 18:58
- Microsoft investigates outage affecting Microsoft 365 apps — www.bleepingcomputer.com — 13.10.2025 18:58
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13.10.2025 08:06 1 articles · 7mo ago
Microsoft 365 access disruption affecting some users
Victim Impact UpdateSome users served through the affected infrastructure cannot access Microsoft 365 applications on Monday morning, and Microsoft has tagged the issue as an incident in the admin center because it is causing noticeable user impact.
Show sources
- Microsoft investigates outage affecting Microsoft 365 apps — www.bleepingcomputer.com — 13.10.2025 18:58