TFS Workitems always leave 'Closed By' blank -

We have a TFS worksheet workflow where developers have 'worked' to work. It is largely of the box with our small custom configurations. It shows a 'close date' but not 'closed'. The workflow continues because the testers have determined it themselves and have set the state to 'test', but now I do not see that report The developer who stopped the item closed.

How can I get reports about whom I have worked?

Given that you have a "test" status, it seems that the change has been optimized . Ensure that they have the right rules to update all the changes in the "closed" area, to "close" the area. The transition should look something like this off by definition:

  & lt; State value = "off" & gt; & Lt; Field & gt; .... & lt; FIELD refname = "Microsoft.VSTS.Common.ClosedBy" & gt; & Lt; ALLOWEXISTINGVALUE / & gt; & Lt; COPY = "currentuser" /> & Lt; VALIDUSER / & gt; & Lt; Required /> & Lt; / Region & gt; .... & lt; / Feeds & gt; & Lt; / State & gt;  

More information about customizing work item changes can be found.