Skyhigh Security incident

Incident - Potential O365 Login Issues using reverse proxy

Minor Resolved View vendor source →

Skyhigh Security experienced a minor incident on March 30, 2026 affecting Skyhigh CASB (Skyhigh CASB) and production-us (production-us) and 1 more component, lasting 8d 13h. The incident has been resolved; the full update timeline is below.

Started
Mar 30, 2026, 04:02 PM UTC
Resolved
Apr 08, 2026, 06:00 AM UTC
Duration
8d 13h
Detected by Pingoru
Mar 30, 2026, 04:02 PM UTC

Affected components

Skyhigh CASB (Skyhigh CASB)production-us (production-us)production-eu (production-eu)

Update timeline

  1. identified Mar 30, 2026, 04:02 PM UTC

    We are investigating login failures for users accessing Office 365 through our reverse proxy services without using Single Sign-On (SSO). A Microsoft change is causing it. A fix will be rolled out soon. For assistance, please contact Skyhigh Support.

  2. investigating Mar 30, 2026, 04:02 PM UTC

    We are investigating login failures for users accessing Office 365 through our reverse proxy services without using Single Sign-On (SSO). A Microsoft change is causing it. A fix will be rolled out soon. For assistance, please contact Skyhigh Support.

  3. investigating Mar 31, 2026, 02:00 PM UTC

    We are investigating login failures for users accessing Office 365 through our reverse proxy services without using Single Sign-On (SSO). A Microsoft change is causing it. A fix will be rolled out soon. For assistance, please contact Skyhigh Support.

  4. resolved Apr 08, 2026, 06:00 AM UTC

    The issue has been resolved.