Configuration baselines in Configuration Manager 2007 contain configuration items with associated configuration baseline rules. You can add a configuration item to a configuration baseline by modifying the configuration baseline rules.
To add a configuration item to a configuration baseline
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In the Configuration Manager console, navigate to System Center Configuration Manager / Site Database / Computer Management / Desired Configuration Management / Configuration Baselines. 
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Right-click the configuration baseline to which you want to add a configuration item, and click Properties. 
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Click the Rules tab, and click the rule you want to associate with the configuration item you are adding to the baseline. 
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In the Add Required Configuration Items dialog box, select the configuration item to add and click OK. 
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Click OK to save the changes in the configuration baseline properties. 





