Of course they knew. that's what the Touchpoints were about...This sells newspapers a muted Yellow Journalism...

"US Army officials were not yet aware that Microsoft's militarised HoloLens 2 augmented reality (AR) system would need several hardware and software fixes when they awarded the company with a multi-billion-dollar production contract in March. These revelations wouldn't materialise until the following month when the service tested out a new iteration of the head-up display, and maturation concerns ultimately forced army leaders to put soldiers' safety first and delay fielding."