

I don't know whether MS have enabled this a feature recently or if this is a workaround. On your computer, go to your Security info page. You need your computer and your mobile device with the Authenticator app installed. I can't see any reason why you couldn't expand this process to a third device if you needed to, personally wouldn't suggest going over two. Step 1: Add the Authenticator app First, add the Authenticator app as a sign-in method to your account. They will be different but both seem to be accepted. Now sign out of your account in a browser and re-login- do this twice and try the code from authenticator on your primary and secondary device. Step 4- scan the QR code and follow the prompts to verify activation.

Step 3- now add work account via the plus symbol in ms authenticator on your secondary device (do not make any changes to the authenticator on your primary device). Step 2- for those admins out there, you need to disable MFA on the account and then re-enable. Step 1- setup authenticator on the secondary device. Scenario assumes you already have it setup and working on one of your devices: Ok so don't know if people are still trying to set this up- or whether MS still 'don't support' setting up the ms authenticator for one account across multiple devices- but i have managed to set it up in a round about way that probably shouldn't have worked
