Extending Your Activation Grace Period on Windows Server 2008 R2
After playing with some virtual machines I came across a problem with the activation grace period running out
So here is how to extend it
Open a Command Prompt.
Type slmgr.vbs –rearm, and press ENTER.
Restart the computer.
You computer has now extended the evaluation period 60 days!!! You can re-run up to 3 times giving you an activation-free trial period of a total of 240 days!!
How Much Time Is Remaining in the Evaluation Period
You can find out by running the same script this time with different switch
Type slmgr.vbs -dli, and the current status of the evaluation period is displayed.