How to Activate/Extend/Check Windows Server 08/12 Status

Yes, you just have to open command prompt as Administrator (right click and select Run as Administrator) and then enter the command below.

slmgr.vbs –rearm

OR

slmgr.vbs /ato

Another way to extend the evaluation period follow the bit mentioned steps below:

• Open Command prompt as Administrator

• Type the following command “slmgr.vbs /rearm” which reset the licensing status of machine and press enter

• Restart your server then you will found the evaluation period expired to 180 day

When install the evaluation copy first , it only give us 10 days period. We need to active the windows. Once it is active, we can use for 180 days.

 Once the server is rebooted, try the volume license key from system properties or use SLUI 3command 
slui.exe

OR for CORE Version:

slmgr.vbs /xpr