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by saltminer 2565 days ago
My college uses Duo and it has no such restriction, if you tried this recently and couldn't add more than 1, it is probably set by LastPass/1Password.
1 comments

Duo Free used to have a restriction of one device, but it seems for U2F they now require one of their paid plans: https://duo.com/product/trusted-users/two-factor-authenticat...
I didn't even realize they had a free tier, makes sense.