Computer Hack

Extend Evolution copy license by performing below steps

1. Windows Server 2012 R2
      Step 1: Run Command Prompt as Administrator
      Step 2: Type "slmgr.vbs /rearm" then press Enter (ignore quotations)
      Step 3: Restart
2. Windows Server 2008 R2
     Replace above command with "slmgr.vbs -rearm"
remaining steps are common
You can do this hack for 3 times

You can perform it on any windows version but check which one works for your version.

 For clear info on "slmgr" command refer http://www.tech-recipes.com/rx/2062/vista_activation_slmgr_command_options_explained/

http://www.windowsnetworking.com/articles-tutorials/windows-server-2008/Windows-Server-License-Manager-Script-slmgrvbs.html