Seems too early to fail, but stalling while driving has been linked to a faulty throttle body. When it failed to start, did any lights/lighting come on or was it just plain dead? Shouldn't be a failed battery/alternator, but could be. Assuming all wiring is properly clamped down. Those would be my prime suspects.
When was the Edge built and when did you buy it? Go to the link below, input your VIN to get the build date info:
https://www.etis.ford.com/vehicleRegSelector.do