Content Security Policies (CSP) are coming to SharePoint Online and might impact your custom SPFx solutions [MC1193419]

Content Security Policies (CSP) are coming to SharePoint Online and might impact your custom SPFx solutions [MC1193419]

Message ID: MC1193419 We’re improving SharePoint Online security via Content Security Policy (CSP) enforcement. Currently CSP is applied in reporting mode but as of March 1, 2026, the Content Security Policy will be enforced which will prevent the loading of…