Windows Server Extend Expired Trial LicenseWindows / 1 December 2022 In my GNS3 ISE lab, the Windows 2016 AD Server had expired the 180 days trial license. This can be extended for another 180 days quite easily. Open PowerShell and run slmgr -dlv 012 slmgr -dlv slmgr -rearm 012 slmgr -rearm Restart the machine and check the license has been refreshed. slmgr -dli 012 slmgr -dli