Live / Incidents / Cohesity Helios
Cohesity Helios: Customer Action Needed - Migrate to Certificate Based Authentication (CBA)
Cohesity Helios · cohesity.comImpact: maintenanceResolved2026-07-16 19:32 UTC
Public — what happened
Summary
We are reissuing this incident statement as Microsoft has recently made the change and we have seen many tenants that have not migrated. Below is the original incident language that was sent in February 2026.
Cohesity is issuing this advisory to inform our Cloud Protection Service (CPS) customers of an important change regarding authentication for Microsoft 365 workflows. Microsoft is retiring Azure Access Control Service (ACS), effective April 2, 2026. Currently, ACS is utilized for authentication in certain Microsoft 365 workflows, including backups for SharePoint, OneDrive, Teams, and Groups.
After April 2, 2026, backups for these protection jobs will fail unless customers migrate to Ce
Timeline
- Started — 2026-07-16 19:32 UTC
- Last update — 2026-07-16 19:32 UTC
- Resolved — 2026-09-16 14:12 UTC
With SquidGrid — where it starts on the route
Independent path health
The status page is the symptom. SquidGrid measures the paths that reach Cohesity Helios against their own baselines — whether the routes carrying your traffic degraded, at which handoff, and who owns that stretch.
🔒 Sign in to seeCustomers get the live Provider Assessment Report for Cohesity Helios: its full incident track record, what tends to break, and recent public reports of problems.
Included with any paid plan.
Open the Cohesity Helios report →