MC1117115 | (Updated) Updates to custom scripting in sites and Classic Publishing site creation

Service

SharePoint Online

Last Updated

2026-01-29T17:41:22.237Z

Published

2025-07-18T00:06:36Z

Message ID

MC1117115

Updated January 29, 2026: We are updating this post as a reminder. Upcoming SharePoint Online changes may impact your organization. Please review the below. We are implementing the following changes to custom scripting and classic publishing in SharePoint Online. 1. Disablement of custom scripting Custom scripting will be disabled by default (setting DenyAddAndCustomizePages to 1 or $true) for sites created with the following templates: • BLANKINTERNETCONTAINER#0 = Classic Publishing Portal Site • CMSPUBLISHING#0 = Classic Publishing Site • BLANKINTERNET#0 = Classic Publishing Site Blank • CSPCONTAINER#0 = SharePoint Embedded Site NOTE: • Existing classic publishing sites created with the te...

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