Skip to content
OutageDeck

Incident detail

Microsoft Ribbon PAB Operation Timeout

Resolved incidentMinor

Timeline window

to

Outage alerts

Get alerted the next time KnowBe4 breaks

Free email alerts for up to 5 providers — no card, live in about a minute. Paid plans add Slack, Discord, and webhook delivery across your whole stack, plus higher API quotas.

Set up free alertsHow KnowBe4 alerts work

Timeline

Incident updates

Updates are normalized from the official source chronology so timeline changes remain easy to scan.

  1. Identified

    We are seeing errors when using the Microsoft Ribbon Phish Alert Button (PAB) to report emails in Classic Outlook. Our team is aware and investigating these errors.

  2. Monitoring

    A fix has been implemented and we are monitoring the results.

  3. Resolved

    This incident has been resolved.

  4. Resolved

    From Monday, May 18, 2026, at approximately 14:00 (UTC), to Tuesday, May 19, 2026, at approximately 15:00 (UTC), users experienced timeouts when attempting to use the Microsoft Ribbon Phish Alert Button (PAB) in Classic Outlook.

    This issue was caused by an update to the PAB's authentication process that was incompatible with the Classic Outlook environment. The update used a loading method that Classic Outlook does not support, which caused the PAB to time out before it could connect to KnowBe4's servers.

    To resolve this issue, we updated how the authentication library is packaged with the PAB to ensure compatibility with Classic Outlook. The Microsoft Ribbon PAB returned to normal performance by approximately 15:00 (UTC) on May 19, 2026.

    To prevent this type of issue in the future, we are updating our processes for compatibility testing and improving monitoring.

    No data loss occurred as a result of this issue.