Happy Chinese New Year to my Chinese friends and Happy holiday to the non-Chinese friends!
There are cases where you have to apply the license later due to you have to wait for the license key. So you had to proceed deploying and running your tasks. However, the GUI of activate the Windows Server license doesn’t prompt to allow you to key in the product key and there is no error shown. (After you have promoted the server as Domain Controller)
The solution is to activate the license key through command prompt or Windows PowerShell and run as administrator.
If you have forgotten the command, is “slmgr” and to see the list of the command’s option just type “slmgr /help“, it will prompt the list.
Here is an example;
Below is the command to activate your license key;
slmgr /ipk <your product key>
If you wish to view expiration of your license key, then you could use this command;