I have SPD workflow on list which gets triggered from console application running on SharePoint Server.
Workflow is very simple, it just checks if date from one field in the list is today's date or older and sends email to about it to one email address.
It was working as expected and it suddenly stopped working. Workflow is failing at the step of sending an email and goes on to Cancelled status.
If I trigger workflow manually from SharePoint user interface it will run without any issue.
Any help on this is much appreciated.