Tag Archives: Authenticator app

How to change MFA method for your Office 365 account

This might look like an easy blogpost (actually, it is) but every time I’m struggling with this, so I decided to write it down.

My default MFA authentication method was a text message (SMS) on my phone. This works fine, but it is not always easy to work with, especially not when using the native mail app on a mobile device. So, to change it, logon to OWA or the Microsoft Portal, click the initials in the upper right corner and click View account:

You can also navigate to https://myaccount.microsoft.com to get here directly. In the overview page click on Security Info to see the MFA methods available. To add a new method, click +Add Method.

In the pop-up window, select another method, for example the authenticator app and click Add. The first step is of course to download the authenticator app on your device, if it’s already installed click Next.

In the Setup your account pop-up box click next and a QR code will appear on your screen:

In the authenticatorapp, click the + icon in the upper right corner, select your account type and select Scan QR code. Approve the sign-in on your device, the security info will show Notification approved and you’re good to go.

The last step you have to do is to change the default sign-in method on the security info page by clicking Change next to Default sign-in method.

Authenticator app for Office 365

I have been running MFA for Office 365 user accounts up-and-running for quite some time now and very satisfied with it. But as you may have seen in the blogpost, I have been running SMS only, and with a 30 days renewal that works fine. But I was also interested in the Authenticator app, especially when running multiple clients on mobile devices.

Changing the authentication can be done on a per-user basis. Logon to the Microsoft portal (portal.office.com) using your regular work account. Select My Account (under your thumbnail profile picture) and select Security and Privacy and click Additional security verification as shown in the following screenshot:

Select Update your phone numbers used for account security, check the Authenticator app or token checkbox and click Setup authenticator app button.

Scan the QR code on your mobile device in the authenticator app, confirm the registration, click Save and you’re all set. The next time you logon to Office 365 you’ll see the following Approve Sign in Request window:

But instead of entering a verification code received via SMS you must approve the sign in on the Authenticator app.