Topic
As part of the September 2026 CU update, legacy SharePoint workflow engine will be disabled by default on all site collections. This change will impact Nintex workflows using the legacy workflow engine (SharePoint 2010 workflows). SharePoint 2010 workflows will need to be enabled again through SharePoint PowerShell.
Instructions
Execute the below command in SharePoint Management Shell from the SharePoint server to enable SharePoint 2010 workflows.
Enable-SPLegacyWorkflow http://site-collection-url
Note: This command can be executed prior to the September CU update as long as the August 2026 CU is installed.
Run the below command to determine which site collections have legacy workflow engine enabled.
Get-SPLegacyWorkflowEnabledSites