Use System Manager to add and remove systems in a service group's system list.
A priority number (starting with 0) is assigned to indicate the order of systems on which the service group will start in case of a failover. If necessary, double-click the entry in the Priority column to enter a new value. Select the check box to add the systems to the service groups AutoStartList attribute. This enables the service group to automatically come online on a system every time HAD is started.
From Cluster Explorer, click the service group in the configuration tree, and click Tools menu.
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In the Service Groups tab of the Cluster Explorer configuration tree, click a service group, and click on the toolbar.