Cohesity Helios Status
Real-time updates of Cohesity Helios issues and outages
Cohesity Helios status is Operational
Cohesity Helios Cohesity Cloud Services Portal
Cohesity Helios Data Protect delivered as a Service
Cohesity Helios Cohesity FortKnox
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Active Incidents
We are currently investigating an intermittent issue impacting certain Microsoft 365 backup jobs (OneDrive and mailbox workloads). Some objects may temporarily be reported as Unprotected, and new backup jobs may be temporarily unable to run. Please be assured this is not attributable to any action on your part; our team has identified the root cause and is implementing a fix. We will provide further updates as they become available.
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 Certificate-Based Authentication (CBA). To ensure uninterrupted service and data protection, we strongly recommend that all customers review the provided Knowledge Base (KB) article and follow the migration instructions.
This impacts all regions and all CCS customers.
Recommended Action:
All recipients of this Field Notice are advised to review the KB article from the additional Resources section for detailed information and recommended preventive actions.
KB article: https://support.cohesity.com/s/article/Steps-to-enable-CBA-Migration-for-CPS Microsoft change announcement: https://learn.microsoft.com/en-us/sharepoint/dev/sp-add-ins/retirement-announcement-for-azure-acs
We are currently experiencing an impact to our backend infrastructure in AWS ME-Central-1 region due to operational issues with our primary cloud provider (AWS). Our team is actively monitoring the situation and working to minimize any disruption. We will share updates here as soon as we have more information on resolution and restored availability
Recently Resolved Incidents
The Activity Page and Reports on the Helios platform may show delayed or stale information due to an unplanned background sync issue. Our team has identified the cause and is actively working to resolve it. We'll post an update once syncing is back to normal — thanks for your patience!
Cohesity Helios Outage Survival Guide
Cohesity Helios Components
Cohesity Helios Cohesity Cloud Services Portal
The Activity Page and Reports on the Helios platform may show delayed or stale information due to an unplanned background sync issue. Our team has identified the cause and is actively working to resolve it. We'll post an update once syncing is back to normal — thanks for your patience!
We are currently investigating an intermittent issue impacting certain Microsoft 365 backup jobs (OneDrive and mailbox workloads). Some objects may temporarily be reported as Unprotected, and new backup jobs may be temporarily unable to run. Please be assured this is not attributable to any action on your part; our team has identified the root cause and is implementing a fix. We will provide further updates as they become available.
Cohesity Helios Data Protect delivered as a Service
We are currently experiencing an impact to our backend infrastructure in AWS ME-Central-1 region due to operational issues with our primary cloud provider (AWS). Our team is actively monitoring the situation and working to minimize any disruption. We will share updates here as soon as we have more information on resolution and restored availability
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 Certificate-Based Authentication (CBA). To ensure uninterrupted service and data protection, we strongly recommend that all customers review the provided Knowledge Base (KB) article and follow the migration instructions.
This impacts all regions and all CCS customers.
Recommended Action:
All recipients of this Field Notice are advised to review the KB article from the additional Resources section for detailed information and recommended preventive actions.
KB article: https://support.cohesity.com/s/article/Steps-to-enable-CBA-Migration-for-CPS Microsoft change announcement: https://learn.microsoft.com/en-us/sharepoint/dev/sp-add-ins/retirement-announcement-for-azure-acs
Cohesity Helios Cohesity FortKnox
We are currently experiencing an impact to our backend infrastructure in AWS ME-Central-1 region due to operational issues with our primary cloud provider (AWS). Our team is actively monitoring the situation and working to minimize any disruption. We will share updates here as soon as we have more information on resolution and restored availability