It would make sense to think that when you start with a Windows Evaluation edition and you have spend a lot of time to make it work in your infrastructure and you are happy with it and what to use it, that it would be easy to change it into a regular version. Something like: buy a licence, add the licence key and you are done. But that is not how it works. A Windows Evaluation server works for 180 days and after that it will simply stop. Trying to add a normal licence does not work. You have lost