在.NET应用程序中部署经过身份验证的自动更新的最佳方法是什么？

Currently applications are deployed only to my office of 40 employees or so. ClickOnce works great for this as everyone has network access or VPN access which makes updating pretty straightforward. Now, it has been tasked to me to figure out the best way to deploy these applications to res of the company. ClickOnce would work but the files would be made publicly available to any.Currently applications are deployed only to my