The evaluation version of windows server 2012 and Windows server 2012 R2 operating system license will work only 180days.If you want to extend more 180 days evaluation license, use MS-DOS command.
Command : “slmgr.vbs /rearm”.
How to execute the command?
- Click on Start button
- Type ‘CMD’
- Open ‘Command Prompt’ Run as administrator
- Type command “slmgr.vbs /rearm” and Press Enter
- Reboot server.
Once server reboot is done, your license will be extended to another 180 days.