If you are having trouble getting this tool to work from behind a http
proxy, you might want to try setting the proxy options on the command line
prior to launching the jar file. This information should be added to the
User's Guide. I figured this out after reading:
https://developers.google.com/gdata/articles/proxy_setup
Our corporate apps domain requires us to access our sites via https. This
example is for https with a proxy host name your-proxy-host.com, port 1080