The on-premise TFS installation that we have in our organization was upgraded from 2013 to 2015 and now finally 2018. However, recently we started noticing that the test run results from older test cases were being automatically deleted and the test cases were being set to Active.
I found out through this link that TFS 2015 Update 1 introduced a retention policy and for any older projects it was Never Delete and for any projects created after the Update 1 upgrade was 365 days. And sure enough, the only projects that had data deleted were created after 2015.
Now, we currently do not have a proper TFS admin so we are trying to find out a solution to see if it was possible to recover that deleted test run data or is it gone from the system as well? I have not seen anything on the internet that could help and only articles that I find all link to the above MS page.
So, is it still possible to somehow recover those results? Or are they lost forever?