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## Updating Components on Clusters

You must install and configure ScanMail separately for each node of a cluster. All virtual servers on a node share the same components and update source. When a virtual server from one node has a failover to another node, then ScanMail will compare the components’ versions and retain the most recent one. For this reason, when you check the Summary screen for the component version after a failover, it may show a more recent update than before the failover happened.