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I registered a Yubikey and an Andriod APP to use DUO.
Starting yesterday, I noticed that before, DUO would pop a windows window to ask me to insert and tap my security key and also send a push to my app.
but now it would only send push to my app and ...
Thank you so much for your fast and detailed response, I read about this a few month ago and completely forgot this.
I use DUO for my university’s web authentication. I tried to set my security key as default and i still need to click “Use Security K...