How to extend the Windows Server 2008 evaluation period

SUMMARY: -

This article describes how to extend, or re-arm, the Windows Server 2008 evaluation period. The evaluation period is also known as the "activation grace" period. These instructions apply to any edition of Windows Server 2008. This includes evaluation copies.

INTRODUCTION :- valuating Windows Server 2008 software does not require product activation. Any edition of Windows Server 2008 may be installed without activation, and it may be evaluated for 60 days. Additionally, the 60-day evaluation period may be reset (re-armed) three times. This action extends the original 60-day evaluation period by up to 180 days for a total possible evaluation time of 240 days.

Note In the Windows Server 2008 Evaluation DVD package, there is a 120-day initial evaluation period. You can extend the evaluation period to 240 days. To extend the initial evaluation and testing period, follow the steps in this Microsoft Knowledge Base article. 

MORE INFORMATION :- 

How to install Windows Server 2008 without activating it

1. Run the Windows Server 2008 Setup program.
2. When you are prompted to enter a product key for activation, do not enter a key. Click No when Setup asks you to confirm your selection.
3. You may be prompted to select the edition of Windows Server 2008 that you want to evaluate. Select the edition that you want to install.
   
   Note After Windows Server 2008 is installed, the edition cannot be changed without reinstalling it.
4. When you are prompted, read the evaluation terms in the Microsoft Software License Terms, and then accept the terms.
5. When the Windows Server 2008 Setup program is finished, your initial 60-day evaluation period starts. To check the time that is left on your current evaluation period, run the Slmgr.vbs script that is in the System32 folder. Use the -dli switch to run this script. The slmgr.vbs -dli command displays the number of days that are left in the current 60-day evaluation period.

How to manually extend the evaluation period

When the initial 60-day evaluation period nears its end, you can run the Slmgr.vbs script to reset the evaluation period. To do this, follow these steps:

1. Click Start, and then click Command Prompt.
2. Type slmgr.vbs -dli, and then press ENTER to check the current status of your evaluation period.
3. To reset the evaluation period, type slmgr.vbs –rearm, and then press ENTER.
4. Restart the computer.

http://support.microsoft.com/kb/948472