Cameron Fuller made small but nice management pack that will alert you when your Windows Server is not activated. Unfortunately this was in 2009 and now the MP does not work with latest version – Windows Server 2012 and Windows Server 2012 R2. I’ve contacted Cameron to ask him to test a modified by me version that works with Windows Server 2012 and R2. When test was successful we’ve agreed to publish the new version. The new version is tested with System Center 2012 R2 Operations Manager for Windows Server 2012 and Windows Server 2012 R2. There is a good chance that will work also with Windows Server 2008 R2 as the events that the MP is monitoring are probably the same. The new version number is 1.0.3.0 and can be downloaded from here. Feel free to leave any comments if you see improvements that can be made.
Here is description for the MP provided by Cameron:
Sample MP with three monitors that appear under Windows Computer / Configuration to show the status of windows from an activation perspective.
This monitor generates alerts if the server is either about to fail activation or has a failed activation. The health of the monitor is shown in health explorer under Entity Health / Configuration / Licensing Check Status.
The monitor looks for event id’s which indicate that either the Windows Activation Licensing is about to fail or has failed. If it’s about to fail that means that it’s not currently activated and will expire soon. If it has failed that means that it needs to have windows activated. This functionality I believe has been added into the windows server operating system management pack but it was not there when I created this as a sample.
Cloud Administrator in Azure World 
Thank you for this, it works great.
Thank you, good thing.
Thanks.