MFA & Verification Issues

How to Manage Microsoft Authenticator Devices for One Account

Steven ParkerSteven Parker Oct 23, 2026 868 views

Question details

The user needs to securely transition their Microsoft Authenticator setup to a new device or manage approved multi-factor authentication methods without increasing security risks.

How to Manage Microsoft Authenticator Devices for One Account
Product
Microsoft Authenticator
Device & OS
not provided
Scenario
Replacing an old mobile device with a new one while maintaining secure access to a Microsoft account.
Observed behavior
The user wants to configure a new device for authentication but needs to avoid the security risks associated with keeping multiple devices active on a single account.
Before you start

Ensure you have access to your Microsoft account security dashboard via a web browser and keep your old device nearby if it is still required to approve the login.

Solution 1Recommended

Replace an Old Phone with a New Authenticator Device

To maintain optimal security, remove the old device from your account before or immediately after adding your new device.

Microsoft strongly advises against configuring a single user account on multiple Authenticator devices, as this widens your security vulnerability. When upgrading to a new phone, the best practice is a clean swap.

1
Sign in to Security Settings

Go to the Microsoft account security dashboard online and log in. Navigate to the 'Advanced security options' or 'Security info' section.

2
Remove the Old Device

Locate your old phone in the list of registered sign-in methods. Click 'Remove' or 'Delete' next to the Microsoft Authenticator entry for that specific device.

3
Add the New Device

Click on 'Add a new way to sign in or verify' and select 'Use an app'. Open the Microsoft Authenticator app on your new phone and scan the provided QR code to complete the setup.

Replace an Old Phone with a New Authenticator Device
Work or School Accounts: If you are managing a work or school account, your organization's IT department might restrict device changes. You may need to contact your administrator to revoke the old token.
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Frequently Asked Questions

Can I have Microsoft Authenticator on two phones for the same account?

While it is technically possible in some environments, Microsoft strongly advises against keeping one account active on multiple Authenticator devices due to increased security risks. It is best to use a single, primary device.

What should I do if the phone with my Authenticator app is lost?

You should immediately log into your Microsoft account using a backup verification method (like SMS or an alternate email), go to your security settings, and delete the lost device from your approved Authenticator list.

Why does my organization require IT approval to change my Authenticator device?

Many organizations enforce strict security policies to prevent unauthorized access to company data. IT administrators may need to manually revoke your old device's access token before a new device can be registered.