According to The Australian, the entire Australian Defence Force has been banned from using the app because of, 'apparent suspicions around security flaws in the conferencing system and fears that sensitive information could be accessed by unknown threat actors who exploit these flaws.'
Hamish himself admitted to Nova's Fitzy & Wippa, 'There was a meeting with the Air Force, it’s a flight log meeting, a guy emailed me and said, "hey mate just pop into our flight log meeting, there will be a few Sergeants, few high-ranking people but should be interesting for you!"
'So I went in there, the lady running it, who I assume is a high-ranking officer as soon as she saw me come up she said: "Ah, no this is a work call!"'