slmgr /ipk YOUR-NEW-PRODUCT-KEY slmgr /ato Run:
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: windows server 2016 evaluation to standard
If you are using Volume Licensing, use the generic KMS client key first, then activate: slmgr /ipk YOUR-NEW-PRODUCT-KEY slmgr /ato Run: This process