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Office 365 Users Unable to Log On with Multi-Factor Authentication

At approximately 9:30 PM CDT on October 18, 2018, Office 365 Multi-Factor Authentication services went down preventing users with this vital security service from being able to sign on. Microsoft reports that they are investigating the issue updates published hourly at the Office 365 Service Health Status.

Nothing has been publicized by main-stream media as of yet. A similar incident occurred on November 18, 2018 due to implementing an update and a hotfix was released to correct but took nearly 4 hours.

As streamlining technology is about avoiding risks, we purposefully don’t implemented updates or changes over a weekend or holiday so revenues aren’t lost and users don’t go looking for pitchforks and torches.


MO193431 – Unable to access the admin center

Status: Service degradation
User impact: Users may be unable to sign in Microsoft 365 admin center

Latest message: Title: Unable to sign in to Microsoft 365 Admin Center

More info: Users may not receive authentication requests via phone call, SMS or within their authenticator app.

Current status: We’re continuing to investigate data to understand why users are no longer receiving prompts via the app.

Start time: Friday, October 18, 2019 9:32 AM

Next update by: October 18, 2019 10:12 AM


Microsoft has a 99.99% uptime (or approximately 45 minutes of downtime per month) Service Level Agreement with all cloud customers and is historically reliable as shown at the Office 365 Operations Trust Center.

Matrixforce is a direct Cloud Solution Provider with Microsoft and will publish any necessary customer action upon official notification from Microsoft.

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