The Microsoft Edge WebView2 Runtime is a prerequisite for the Unity Client. If not already installed, WebView2 should be installed using the Evergreen Runtime distribution mode. The Evergreen Runtime allows Windows Server Update Services or an equivalent update service to apply the latest features and security updates.
The Edge WebView2 Runtime can be obtained from the download section of the Microsoft Edge WebView2 website at https://developer.microsoft.com/en-us/microsoft-edge/webview2/.
For additional information on managing WebView2 applications and the WebView2 Runtime, see the Enterprise management of WebView2 Runtimes article on the Microsoft Documentation site: https://docs.microsoft.com/en-us/microsoft-edge/webview2/concepts/enterprise.