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SharePoint Designer workflows run as System Account but with their permissions trimmed down to impersonate those of the user that initiated the workflow. We faced a similar issue to yours in our SharePoint environment and identified that it was due to workflows being fired automatically by System Account.
Why does my workflow do not auto start?
(No errors or error messages, just won’t start !) https://cloudsites.vzbi.com/sites/pcimage I have checked “Allow Workflow to manually Start” and also checked “Start workflow automatically when item is created” If you use System Account then workflow will not auto start on Item Create etc.
When do I uncheck’start this workflow’?
I came across a situation where I had to uncheck ‘Start this workflow when an item is changed.’ to at least have the workflow continue operation when a new item is created. This is a mutually exclusive situation which might not be applied to your requirements but it’s a start as to the behavior of the workflow itself.
When do I select the checkbox start workflow?
While publishing the workflow, u need to select the checkbox Start workflow automatically when an item is created or changed for the workflow to start automatically or else whatsoever the WF will not start automatically. Workflow will never start automatically with system account.
Is there a workflow for creating a list?
The list has a workflow that should be triggered on item creation, however it is not being triggered. If I create the item manually the workflow then IS triggered. I tried creating the item both in SP 2010 with or without impersonation and SP 2013 workflows, but all do not trigger the workflow to start. Any ideas?
Now however, when I create a simple workflow on a List that has other workflows running fine, just one that says “Log testing workflow” in the log, it “Fails on Start”. SharePoint Designer workflows run as System Account but with their permissions trimmed down to impersonate those of the user that initiated the workflow.
Is it safe to deactivate and reactivate a workflow site feature?
24/09/2018 Update to Answer: you might also like to read this Answer relating to whether or not it is safe to deactivate and reactivate a workflow Site Feature (it seems like running workflows would/could be lost). Type System.CodeDom.CodeBinaryOperatorExpression is not marked as authorized in the application configuration file.
How can I get around the failing workflows?
To get around this, we created an administrative account in our environment called ‘DOMAIN\\SP_Workflow’ and opened/re-saved/published the failing workflows while logged in under this new account. After making this change, the previously failing workflows started as expected.
Why do I get error workflow was cancelled by system account?
It’s getting the error “Workflow was cancelled by System account and failed on Start”. It’s happening for recently created workflows in this site collections and old workflows are working fine. If I create a new workflow in this site collection I get the issue.