Nextcloud Client - How to pre configure server address ?

Hey,

I am looking for a way to pre configure the server address for the Nextcloud Client.

Even in Version 33.0.4 does a Configuration Profile not work.

This is the JSON that I use, but it does not work for domains

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
  <dict>
    <key>serverurl</key>
    <string>https://your.domain</string>
    <key>username</key>
    <string>$USERNAME</string>
  </dict>
</plist>

Has anyone found out, how to get this to work?

Thanks in advance.