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ClassLink Outage History

Every past ClassLink outage tracked by IsDown, with detection times, duration, and resolution details.

There were 115 ClassLink outages since January 2017. The 9 outages from the last 12 months are summarized below, with incident details, duration, and resolution information.

Minor May 19, 2026

May 2026: Intermittent DUO MFA authentication errors

Detected May 19, 2026 8:44 AM EDT · Resolved May 20, 2026 9:42 AM EDT · Duration 1 day

ClassLink experienced intermittent DUO MFA authentication errors that prevented some users from logging in, affecting Active Directory, Google, and Azure integrations. The incident lasted 25 hours while the team worked with DUO support to identify and implement a fix. The authentication errors were successfully resolved after DUO applied their fix.

Minor April 10, 2026

April 2026: Roster Server Import Settings Issue

Detected Apr 10, 2026 8:44 AM EDT · Resolved Apr 10, 2026 4:20 PM EDT · Duration about 8 hours

ClassLink experienced an issue where some tenants had missing thresholds and settings in their Roster Server, prompting the team to place all Roster Servers in maintenance mode to prevent further configuration changes and potential data loss. The problem affected only a subset of tenants, not the entire user base. After 7.6 hours, a fix was deployed and all affected tenants had their thresholds and settings restored.