Another management pack for Windows Server role or feature is updated. If you open the download link you will see that the page and the title says “Windows Server 2008 Network Load Balancing Management Pack for Operations Manager 2007” but actually the management pack monitors any NLB from Windows Server 2008 till 2012. Also the management pack is supported on SCOM 2012 also. You can find all this information in the guide of the MP. So definitely read the guide before importing this new MP.
Another article from Travis Wright from SCSM team: How to Configure the Self-Service Portal SharePoint Site or the Web Content Server for Load Balancing. Some of the steps of this article can be used to configure NLB cluster for you SM management servers.