Yes, you can add as many devices as you want. However, it is not recommended for you to add too many devices or someone else’s cell phone, because this will end up in the authentication becoming a really big hassle rather than an security measure because you will have to sift through a large list to find the device that you currently have access to. Remember that you can always add or remove devices at any time, and it is better to keep a small list of devices you will be using. See here for more information.
For additional information or assistance, please contact the Tech Desk at 570.577.7777 or firstname.lastname@example.org.
Keywords: authentication, duo,factor, mfa, multi,security