It is not possible to provision the DME client app for Windows Phone except through the Windows Phone Store.
To get the DME app from Windows Phone Store,
Wait for the DME app to download and install.
This is also described in the DME App User Guide for Windows Phone.
You can of course distribute a direct link to DME on the Windows Phone Store:
http://www.windowsphone.com/da-dk/store/app/dme/78526775-2f16-4c9e-a611-1955ecf25bcb
by email or SMS.