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SharePoint Workflows: Extend Timeout
How do I extend the execution time of a SharePoint workflow? Currently we are concerned with SharePoint 2016 Workflows. It appears to be running for around 20 minutes and then terminates. The even...
Craig Lamb SharePoint 2016 uses new workflow engine. You can check the blog post http://www.andrewconnell.com/blog/publishing-custom-events-to-sharepoint-2013-workflowson how to use Custom Events for Long Running External Processes.
Did you try WaitforCustomEvent activity
https://msdn.microsoft.com/en-us/library/microsoft.sharepoint.workflowservices.activities.waitforcustomevent.aspx
http://www.andrewconnell.com/blog/publishing-custom-events-to-sharepoint-2013-workflows