You are downloading the HC VPN Messaging AppX file v184.108.40.206 for Windows Phone. HC VPN Messaging is a free Social App: A secure private messaging app for HC users. This application allows HC users to interact within the organization using a secure. You can now download the offline AppX package file to install & try it.
Download Locations for HC VPN Messaging 220.127.116.11 AppX file
To try to install it manually from an SD card, you should choose one of the server location above to get the offline HC VPN Messaging AppX file, move the file to your phone's SD card and then tap 'Install local apps' in the phone's App list.