Microsoft 365 Alert – Service Degradation – SharePoint Online – Users may be unable to edit SharePoint Online sites using the SharePoint Designer 2013 tool – RESOLVED

Announcements Arpan Das

20/03/2026 08:40:00 AM

NHSmail Reference: INC46783881

Microsoft Reference: SP1256716

Issue Status: RESOLVED

Issue Description: Users may be unable to edit SharePoint Online sites using the SharePoint Designer 2013 tool.

Final Update: 16/03/2026 08:53:00 AM–The fix has now been fully deployed, and Microsoft have confirmed through testing that this issue is now mitigated.

Scope of impact: Impact may occur for users attempting to edit SharePoint Online sites using the SharePoint Designer 2013 tool.

Root cause: A recent configuration change is preventing users from being able to edit sites using the SharePoint Online Designer 2013 tool.

Next Steps: Microsoft will continue their review of the impacting configuration change to better understand how the change resulted in impact and what they can do to improve their pre-deployment processes to identify and resolve similar issues.