Have you ever been using an evaluation license within Windows Server and had it expire on you just before you are finished your project? Yip, I think we've all hit that snag every so often.
In this article I want to cover the ways you extend the Windows evaluation period for the server.
Windows Server 2016/2019
To reactivate your trial license you need to open a command prompt, this can be something like Command Prompt or PowerShell.
The Software Licensing Management Tool (SLMGR) tool is the one you want to invoke. There are a lot of switches with this tool. The ones we are concerned with are:
This command displays the current license information with activation information as well. It's quite a useful command and provides a great deal of information.
The second command is the one that rearms the license:
Be sure to give the server a reboot after this command to initiate the changes. Once you have done that you can use the -dlv switch again to check on the licensing status and how many rearms you have left.
This syntax will work on older versions of Windows Server as well.