At the Program Features step of the wizard, you can choose which Veeam ONE components you want to install. You can choose only one of the two suggested components (Veeam ONE Server or Veeam ONE Web UI), or install both of them at the same time. Note that if you choose to install only one component, you will need to repeat the installation procedure on another machine to install the other component (so that you can attain the full Veeam ONE functionality).
If you choose to install both the Veeam ONE Server and Veeam ONE Web UI components, the advanced deployment will mirror the typical, but will not include Veeam ONE Monitor Client: you will need to install Veeam ONE Monitor Client separately.
If necessary, you can change the installation directory at this step.