Windows 10: I don't have my old phone and it keeps asking for Authentication through the Authentication...

Basically how it's written on the topic. I do not have acess to my old phone and wish to change the primary authentification method. Is there any way I can do this?

:)

 

authenticator for android

Pair an authenticator app with your Microsoft account
We won't use this to spam you - just to keep your account more secure.

Verify phone via:

An authenticator app works by generating a new security code every 30 seconds. Once you have an authenticator app installed on your smart phone and paired with your account, you can always get a code - even if you have airplane mode turned on, or are anywhere
without cell service. Authenticator apps are available for many smart phones today, and most of them will work with your Microsoft account.

Just a few simple steps, and you'll be all set

• If you have a Windows Phone,
  get Microsoft's authenticator app. If you have an iOS, Android, or BlackBerry device, search your app store for an authenticator app.
  
• Install the app and then open it.
• Pair the app with your Microsoft account by scanning this bar code.

 

New Microsoft Authenticator app version for Android and iOS - Nov. 12

Two factor authentication (TFA) is easy, convenient, and secure when you use Microsoft Authenticator. Use your phone, not your password, to log into your Microsoft account. Just enter your username, then approve the notification sent to your phone. Your fingerprint, face ID, or PIN will provide a second layer of security in this two step verification process. After youve signed in with two factor authentication (TFA), youll have access to all your Microsoft products and services, such as Outlook, OneDrive, Office, and more.

Microsoft Authenticator version 6.2010.7266 for Android

Source: Microsoft Authenticator - Apps on Google Play




Microsoft Authenticator version 6.5.4 for iOS

Download: Microsoft Authenticator | App Store

 

New Microsoft Authenticator app version for Android - March 8

Two factor authentication (TFA) is easy, convenient, and secure when you use Microsoft Authenticator. Use your phone, not your password, to log into your Microsoft account. Just enter your username, then approve the notification sent to your phone. Your fingerprint, face ID, or PIN will provide a second layer of security in this two step verification process. After youve signed in with two factor authentication (TFA), youll have access to all your Microsoft products and services, such as Outlook, OneDrive, Office, and more. Microsoft Authenticator version 6.2303.1482 for Android WHAT'S NEW

• We're always working on new features, bug fixes, and performance improvements. Make sure you stay updated with the latest version for the best authentication experience.

Source: Microsoft Authenticator - Apps on Google Play