Still on the 90-day CSP delay? Your SharePoint Online enforcement deadline is 1 June 2026. Here's your 8-week action plan to audit violations, fix scripts, and test before the window closes.

Microsoft is enforcing CSP in SharePoint Online on March 1, 2026. Non-compliant scripts will be blocked. Here's what's changing, what's at risk, and how to prepare your environment before enforcement goes live.