Operations Manager 2012 Sizing Helper Tool

The Operations Manager-Team has released an interactive Excel-document that can be used for planning and sizing of your System Center Operations Manager 2012 Deployment.
http://blogs.technet.com/b/momteam/archive/2012/04/02/operations-manager-2012-sizing-helper-tool.aspx

You can download the latest version of the Tool from the Download page for System Center 2012 – Operations Manager Component Add – On,
http://www.microsoft.com/en-us/download/details.aspx?id=29270

Or from this direct link:
http://blogs.technet.com/cfs-file.ashx/__key/communityserver-components-postattachments/00-03-48-96-45/System-Center-2012-Operations-Manager-Sizing-Helper-Tool-v1.xls

Enter license key in SCOM 2012

SCOM 2012 installs in evaluation mode as there is no way to enter the license key during install. You have to add the license key using powershell as described below when the installation has finished:

1. Start Operations Management Shell as Administrator
2. Run the following powershell cmdlet:
Set-ScomLicense -ProductId <your productkey>
3. Verify that the new licensekey has been set:
Get-SCOMManagementGroup | ft skuforlicense, version, timeofexpiration –a

Reference: http://support.microsoft.com/kb/2699998

Event ID: 29106 on RMS Server after upgrade to CU5

After an upgrade of the RMS from SCOM 2007 R2 RTM to SCOM 2007 R2 CU5 EventID 29106 started to appear in the OperationsManager EventLog every 5-15 minutes. The solution was to flush the HealtService.
1. Stop the System Center Management Service.
2. Rename the folder “Health Service State” in C:\Program Files\System Center Operations Manager 2007\.
3. Start the System Center Management Service.

References: http://qa.social.technet.microsoft.com/Forums/en/operationsmanagergeneral/thread/084d2917-f5be-44d6-8286-e4fe4cc8dd7d