Cyderes incident

Microsoft 365 Outage and Degradation - Impacting Defender Portal Access

Notice Resolved View vendor source →

Cyderes experienced a notice incident on January 23, 2026, lasting 14h 59m. The incident has been resolved; the full update timeline is below.

Started
Jan 23, 2026, 01:14 AM UTC
Resolved
Jan 23, 2026, 04:14 PM UTC
Duration
14h 59m
Detected by Pingoru
Jan 23, 2026, 01:14 AM UTC

Update timeline

  1. monitoring Jan 23, 2026, 01:14 AM UTC

    Microsoft is experiencing a widespread Microsoft 365 outage that is affecting access to Microsoft Defender portals and related security services. Defender EDR is functioning on endpoints, Cyderes is receiving alerts via our connectors, but the cloud portals and backend services are intermittently unavailable or degraded. This issue impacts management, visibility, and portal access currently – not the agents on endpoints. Cyderes will continue to monitor the situation closely. MSFT ref. MO1221364 in the Microsoft 365 admin center or https://status.cloud.microsoft/m365/referrer=serviceStatusRedirect.

  2. resolved Jan 23, 2026, 04:14 PM UTC

    Microsoft has identified this issue as resolved. Please reference MSFT ref. MO1221364 in the Microsoft 365 admin center for further information. Direct link: https://status.cloud.microsoft/m365/referrer=serviceStatusRedirect