Would like to check if there is a workaround regarding this double login on
initial connection to the WebDav service.

Our test server is OES Linux.

If we used http only, we are prompted once to login.

If we used https, we are prompted twice, and will connect twice. By
disconnecting to the second instance, then rebooting the workstation and
reconnecting to the Webdav service, then it will prompt once.