You can configure the OPC UA server to run as a Windows service, as follows:
1 Open the ESx OPC UA Server configuration tool.
2 Select Settings → Options.
3 Select Enable Service mode.
4 Select File → Save configuration.
NOTE: When the OPC UA server operates as a service, the EcoStruxure OPC UA Server Expert Service Notifier application is enabled and appears as an icon in the taskbar.