Preset server-address in Nextcloud Talk

We’d like to start using Nextcloud Talk and install the Window-Desktop-App by GPO. It would be great, if we can preset the server-address (from login-form) and automatically set the autostart. I found the autostart-setting with in the \AppData\Roaming\Nextcloud Talk\config.json

{
  "launchAtStartup": true
}

Is there also a way to set the server-address like this?

Thank you and best,
Johannes