Thank you for your reply. Unfortunately, I did not found what I was looking for. Getspn - l displays the SPNs, but it does not display the user accounts that are attached to the services. However I can use getspn - l by trying to check common mistakes such as look for the SPNsattached to a user that is admin at another environment, or user that had been admin in the past ect. It is not the best solution, but sometimes it could help.