This wizard configures high availability for a role. After you successfully complete this wizard, if a clustered server fails ...

This wizard configures high availability for a role. After you successfully complete this wizard, if a clustered server fails while running the role, another clustered server automatically begins running the role (a process known as failover). If the role itself fails, it can be automatically restarted, either on the same server or on another server in the cluster, depending on options that you specify.

If you want to cluster a complex application such as a mail server or database application, see that application's documentation for information about the correct way to install it.