You are downloading the Exchange Platforms Board AppX file v1.1.0.0 for Windows Phone. Exchange Platforms Board is a free Education App: Reference to the different platforms of Microsoft Exchange Server.For each platform it will show an Overview, for what is best for, License requirements, IT. You can now download the offline AppX package file to install & try it.
Download Locations for Exchange Platforms Board 1.1.0.0 AppX file
What's New
V 1.1.0.0
Improved GUI
Package File
Please Click Here > to retrieve available package files for Exchange Platforms Board.
Please be aware that the Exchange Platforms Board AppX file you are to download is hosted on the Microsoft Store CDN server. You can read more about Exchange Platforms Board or get it on Microsoft Store.
To try to install it manually from an SD card, you should choose one of the server location above to get the offline Exchange Platforms Board AppX file, move the file to your phone's SD card and then tap 'Install local apps' in the phone's App list.