Scope: Users on SharePoint Online (Modern) - specifically Headed Akumina customers.
Date Effective - March 1, 2026
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As you are already aware, Microsoft is implementing Content Security Policy (CSP) enforcement in SharePoint Online, which will affect customers using SharePoint Modern sites. Our Product team is actively developing a patch to address this issue; however, it is currently progressing through our active Development and QA cycle and will not be released until it has successfully completed that process. As a result, the update will not be available prior to Microsoft’s CSP enforcement rollout. We will provide release timing as soon as the validation cycle is complete.
To ensure continuity of service ahead of enforcement, we strongly recommend implementing the script provided by Microsoft. This script was issued specifically to support customers during the transition period while required updates are being completed and validated.
For clarity on Microsoft’s CSP enforcement and the option to delay enforcement, please refer to:
Implementing this script does not weaken security protections or introduce new vulnerabilities. It keeps the policy in reporting (warning) mode rather than enforcement mode, which is the supported mechanism Microsoft is providing to help organizations complete remediation without interruption. Any issues encountered while running the script should be directed to Microsoft Support.
Following Microsoft's documentation, we have validated this in our labs with the following notes:
- Using PowerShell v 5.1.x appears to work best.
- Using PowerShell v 7.x.x did not yield positive results.
- Ensure you have the SPOService available, by running the following command:
Install-Module -Name Microsoft.Online.SharePoint.PowerShell -Force - This was tested in Akumina labs with Microsoft.Online.SharePoint.PowerShell version:
16.0.26914.12004
To validate the changes, use the following:
Get-SPOTenant | Select-Object DelayContentSecurityPolicyEnforcementThe expected result should look like the following:
