Windows Server 2012 R2 Standard Build 9600 Product Key Activation File
This method works for even after the end-of-support date because Microsoft’s telephone activation lines remain operational for legacy products.
To activate , you can use the Command Prompt or the Windows GUI. If you are using an Evaluation version, you must first convert it to the full Standard edition before your retail or volume license key will be accepted. Option 1: Using Command Prompt (Recommended) This method works for even after the end-of-support