Unable to allow custom scripts for SharePoint site in admin tenant

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Unable to allow custom scripts for SharePoint site in admin tenant

Mansi Gupta 20

Hi!

I am unable to allow custom scripts for Sharepoint sites in admin tenant.

Even after clicking on Allowed and saving, it is still showing Blocked.

Attached are the images for reference.

Thanks!

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Steven-N 16,030 Microsoft External Staff Moderator

Hi Mansi Gupta

Thanks for reaching out to Microsoft Q&A forum support and apologize for the inconvenience

Based on this document: LINK ARTICLE

Any changes to custom script settings for a specific site only last for a maximum of 24 hours. After that time, the setting resets to Blocked.

This behavior is intentional and part of Microsoft’s security model for SharePoint Online. It applies to most site types, including those created via the SharePoint admin center, PowerShell, OneDrive, and modern team or communication sites.

User's image As far as I know, to persist the setting longer, you need to use PowerShell to enable custom script at the site level. Here are the recommended commands:

Set-SPOSite <SiteURL> -DenyAddAndCustomizePages 0

or with the PnP.PowerShell cmdlet Set-PnPSite

Set-PnPSite -Identity <SiteURL> -NoScriptSite $false

Hope my answer will help you.

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Mansi Gupta 20 Reputation points

2025-07-25T11:16:29.4166667+00:00

Hi, in my case it is not changing initially also to Allowed
Mansi Gupta 20 Reputation points

2025-07-25T11:28:49.8366667+00:00

Thanks I am able to do it using Powershell!
Steven-N 16,030 Reputation points Microsoft External Staff Moderator

2025-07-25T11:31:23.04+00:00
Hi Mansi Gupta

Thanks for replying

In this case, from my perspective view, it may come from 3 scenarios:

Site-Level Override: The global setting in the SharePoint admin center does not immediately apply to existing sites. You must use PowerShell approach to enable custom scripts

UI Delay or Cache Issue: Sometimes the admin center UI may not reflect the change instantly due to caching. Try refreshing the page or checking again after a few minutes.

Policy Enforcement: If your tenant has security policies or compliance configurations enforced by Microsoft 365 or your organization, they may automatically block the change.

You can check the above situations, and if the problem persists, kindly let me know for further support.

Best Regards

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Unable to allow custom scripts for SharePoint site in admin tenant

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