I would like to prevent a task from being able to check as finished by a user until a specific field on an item in another list is filled .
So I add an if statement in the completion conditions of my task process -> if the field is empty -> send email to user -> wait for the field change
But the task is always getting marked as finished. How can I prevent it from being completed 100%?
Or can I disable the finish button on my task form until the completion conditions are fulfilled? Or is there another way to achieve my desired behaviour?
FYI: 2010 workflow engine without infopath on SP 2013 environment