Updated June 11, 2025: We have updated the timeline below. Thank you for your patience.

SharePoint Online Tenant Administrators can now allow script sources for modern pages in SharePoint sites. This feature is particularly useful in scenarios where modern pages have custom code that loads scripts (e.g., TypeScript code) from external sources like a content delivery network (CDN). SharePoint will now report to administrators where sources that have not been allowed are loaded from, providing a way for administrators to identify those sources and take action. Tenant Administrators can also enforce browsers to only load scripts from allowed sources. This behavior can be enabled using SharePoint Online Management Shell.