With the launching of System Center 2012, you might be tasked to upgrade existing SCOM 2007 R2 infrastructure to 2012. Information relates to the upgrade can be found here http://technet.microsoft.com/en-us/library/hh205974.aspx . To cut the story short, this is what you need to make sure that the upgrade is successful
In your existing SCOM 2007 R2, (well, at least in my testing environment) it should come with CU 5 installed. Next, before the upgrade, make sure that the server is running 64 bit OS. (can refer to list of support configuration for 2012 here). Next, you will have to install all the pre-requisites needed for SCOM 2012 such as the .Net Framework 4, ReportViewer and Silverlight. (for this, the SCOM 2012 setup wizard will run a pre-requisite checks for you, before you proceed.)
It is told that the agents will need to be upgraded, before monitoring can be resumed. But how are you going to upgrade the agents, if your environment monitors a large number of servers, for e.g. more than 100 servers ? If you are going to manually upgrade it, then it might take time.
Another way you may try is to upgrade the agents, after the RMS and MS had been successfully upgraded to 2012. When you launch the SCOM 2012 console, under the “Pending Management” section, SCOM 2012 will actually show you the list of Agents that require update. What you need to do is to manually approve the upgrade for the agents and it will be automatically handled by SCOM 2012 after this.
