DISM /online /Get-TargetEditions You should see "ServerStandard" listed.

shutdown /r /t 0 After rebooting, open Command Prompt (Admin) and set your KMS server or enter a new key:

For KMS:

This process requires a reboot. It only works if you are still within the initial 180-day evaluation grace period. It converts your installation to a retail (or volume license) Standard edition using a DISKPART method. Text: Converting Windows Server 2016 Evaluation to Standard Step 1: Check Current Edition & Status Open Command Prompt (Admin) or PowerShell (Admin) and run:

If you are using Volume Licensing, use the generic KMS client key first, then activate:

Here is the text for converting a Windows Server 2016 Evaluation copy to a full Standard edition.