Forum Discussion
MFA for one email account with several users
Hi Decomplexity
You can add multiple authenticator app 'instances' on a single account. If you decide to go the push notification way, be aware all registered authenticator apps for that account will get the notification which is something you may wish to avoid.
In that case choose to go the app with code direction. Here you have the choice to have all four devices share the same 'instance' (the 6 digit code will be the same on all devices) or you can create a separate instance for each phone (each 6 digit code will be different). The latter being more secure.
You can find some more detailed information here (article is from 2019 so the screenshots are from the 'old' registration experience but the principle is still valid.
https://blog.ciaops.com/2019/01/15/using-multiple-authenticator-apps-with-a-single-microsoft-365-user-account/
There are a few options for giving multiple users access to the same Outlook email account. One option is to create a shared Outlook business inbox where multiple users access the same business account using different credentials. Accessing the same account using different credentials can also be achieved via delegating access. You can also add multiple authenticator instances to an account. Keep in mind you will need to specify a default method. The other route is to access one account using shared credentials. For the later option you need to set up a webhook automation for forwarding the 2FA code to multiple users. If you are not a developer there is an app, Salepager, that can do this for you.