Microsoft Server 2016 downgrade Licence from Datacenter to Standard

If you accidentally gave the wrong key to Windows Licencing and upgraded your server from 2016 Standard to 2016 Datacenter, by definition found on Microsoft, you will have to reinstall and migrate services to freshly installed server.

But I found a simpler way. Go to – registry, run “Regedit.exe”

Edit: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion

Key: EditionID

Change To: ServerStandard

Key: ProductName

Change To: Windows Server 2016 Standard

Run setup.exe from original Windows 2016 Install CD and choose the correct Standard version.

Chose upgrade and keep all files. After 10-15 minutes your server is running 2016 Standard.