Microsoft 365 apps outage history

Impact began with user reports around Sep 17, 2026 2:45 PM UTC, as many Microsoft 365 users experienced requests not returning results. Copilot on iPhone and other Microsoft 365 apps were notably unresponsive across mobile and desktop clients, affecting productivity and typical workflows.

StatusGator detected an Early Warning Signal at Sep 17, 2026 3:06 PM UTC ahead of any official acknowledgment. There were no published Microsoft 365 status updates during the incident, even as the volume of reports grew across regions. Users in North America and India reported widespread issues with Copilot and other 365 components, suggesting a broad impact across multiple services.

Global users were unable to load the Microsoft 365 website and sign in, with errors like 'Something went wrong. Try reloading.' The outage began at 11:08 PM UTC and lasted about an hour, with connectivity returning by 12:04 AM UTC. The disruption appeared worldwide, with reports spanning North America, Europe, Latin America, and Australia, indicating broad impact on access to the Microsoft 365 website. StatusGator detected the issue at 11:08 PM UTC, ahead of any official acknowledgment from Microsoft 365.

There were no official status updates from Microsoft 365 during the incident, and the status page did not reflect an acknowledged outage in that window. As the service recovered, users could access the site again and resume normal operations.

Outlook users across Microsoft 365 experienced a widespread disruption that prevented emails from loading or syncing, with reports of not sending or receiving messages and some items stuck in outbox. The impact appeared across Outlook web and desktop clients and was reported by users in multiple regions, beginning around 4:00 PM UTC and lasting into the late afternoon. The volume and spread of reports indicated a broad impact on the email experience for many users.

Users across regions experienced sign-in problems and activation prompts when trying to access Office 365 applications. Some tenants were unable to sign in or activate new licenses, which prevented access to Office 365 apps. The issue began when the Microsoft 365 status page transitioned to a warning at 2:52 PM UTC and updates noted ongoing monitoring and troubleshooting efforts, including activation prompts that could fail when signing in.

Over the next several hours, Microsoft documented telemetry reviews and steps to isolate the root cause, followed by incremental traffic restoration as the environment recovered. By 8:22 PM UTC the status returned to up and users in multiple regions — including the United States, United Kingdom, and Canada — began regaining access. The incident lasted roughly five and a half hours and affected the sign-in and license activation flow for Office 365 apps.

Users on iOS devices were unable to sign in to OneNote due to an ongoing issue in Microsoft 365 apps starting at 4:07 PM UTC. The problem was limited to OneNote on iOS devices with OneNote builds 16.112.717.0+ and did not indicate a full outage of all Microsoft 365 services. Workarounds included accessing OneNote via the web, temporarily removing the Authenticator to allow authentication through the in-app webview, or signing in to other Microsoft 365 apps first to bypass the sign-in flow.

The issue persisted over several days with continued user reports describing sign-in failures or slow responses related to OneNote on iOS. The incident was resolved when the status returned to up at 6:02 PM UTC.,

Microsoft 365 apps experienced a global outage that disrupted email delivery and several core services. The incident began at Jan 22, 2026 7:14 PM UTC and was resolved by Jan 22, 2026 10:45 PM UTC, with users unable to send or receive email and to sign in to Office apps, access the Exchange/Outlook services, Admin Center, and calendar features. A large volume of user reports during the event indicated widespread impact across regions and services including Exchange/Outlook, Office apps, and calendar access.

StatusGator detected the issue at Jan 22, 2026 7:14 PM UTC, based on user reports, ahead of any Microsoft status page acknowledgment. In the provided feed, there were no official Microsoft status changes posted during this window.

A high volume of user reports around 20:45–21:30 UTC indicated widespread impact across multiple regions, with issues including email delays, sign-in problems, and outages across Exchange, Outlook, Office apps, and related services like Admin Center and calendar access.

The Microsoft 365 download flow from the homepage experienced a partial outage due to a code issue in a recent service update that disrupted the license check process. Users attempting to download the Microsoft 365 desktop apps likely faced failures or delays. The outage began at Dec 4, 2025 6:47 AM UTC and lasted about 10 hours and 20 minutes, until Dec 4, 2025 5:07 PM UTC.

Microsoft 365's status page published two updates during the incident, acknowledging the problem and the ongoing effort to restore downloads. User feedback was limited, with reports describing failed downloads or stalled installers, and downloadable access returned once the issue was resolved, as reflected in the status page update to up.

Microsoft 365 desktop app installation on Windows devices was disrupted, blocking new installations for many users. Microsoft 365 attributed the problem to a misconfiguration in a newly released set of authentication components and said it was reconfiguring and redeploying those components to remediate the impact. The incident began on Nov 14, 2025 4:57 PM UTC and was resolved on Nov 18, 2025 10:17 PM UTC, lasting roughly 4 days and 5 hours. The provider posted two official updates describing the misconfiguration and the remediation steps. The impact appeared limited to Windows installations, with reports from multiple US regions describing failed installs and intermittent slowdowns during the installation process. After remediation, installation flows returned to normal.

The outage impacted Microsoft 365 Apps with users reporting that My Apps and admin functions were not loading and performing poorly. Symptoms included sign-in/SSO issues, slow page loads, and failures accessing admin dashboards across regions. Microsoft 365 components such as My Apps, admin pages, Dynamics 365 Apps, and SharePoint login were affected, with reports coming from North America, Europe, and Asia, indicating a broad global impact. The incident began at Oct 29, 2025 4:01 PM UTC and lasted about 2 hours and 38 minutes, concluding around Oct 29, 2025 6:39 PM UTC.

No official Microsoft 365 status updates were published during the event. StatusGator recorded an Early Warning Signal at Oct 29, 2025 4:01 PM UTC based on user reports, indicating the issue was detectable before any formal acknowledgment. A high volume of user reports from around the world during the window of 16:00–18:30 UTC suggests widespread impact across North America, Europe, and Asia.

Microsoft 365 apps experienced a partial outage, with some users unable to access the service. The outage began on 9:17 AM UTC and was resolved by 4:27 PM UTC, lasting roughly 7 hours and 10 minutes. The disruption was limited to users served through the affected infrastructure.

Microsoft 365's status page showed two updates during the incident. The first stated that the team was reviewing service monitoring telemetry to isolate the source and establish a fix. The second indicated that the issue had been resolved and services were restored.