Whether you configure Enterprise Vault as a server with cluster support, or as a failover node for an existing clustered server, the Configuration wizard installs the following set of Enterprise Vault services on the node:
An Admin Service is already present from when Enterprise Vault was installed. The presence of this set of services is mandatory on each node, to ensure a common configuration on all nodes in the cluster. You cannot remove Enterprise Vault services in a clustered configuration.
The Configuration wizard sets the Enterprise Vault services to manual startup, to enable the cluster software to start and stop them as required.
More Information
Starting and stopping Enterprise Vault services in a Microsoft clustered environment