MFA & Verification Issues

How to Add Two Work Accounts to Microsoft Authenticator on a New iPhone

Adam Davis Sep 29, 2026 868 views

Question details

The user needs to add two work email accounts to Microsoft Authenticator on a new iPhone, but the accounts are still tied to the previous device.

How to Add Multiple Work Accounts to Microsoft Authenticator on a New iPhone

Product: Microsoft Authenticator
Device & OS: iPhone (iOS)
Scenario: Setting up multifactor authentication for organizational work accounts after switching to a new iPhone.
Observed behavior: The accounts cannot be added to the new iPhone because they remain associated with the multifactor authentication registration of the old device.

Before you start

Ensure your new iPhone has a stable internet connection, and have the contact information for your organization's IT support or Microsoft Entra administrator readily available.

Solution 1Recommended

Reset MFA Registration via Your IT Administrator

This is the required solution when work accounts are strictly bound to an old device. Your organization's administrator must clear the old registration before you can set up the new iPhone.

For security reasons, corporate work accounts typically lock multifactor authentication (MFA) to a specific hardware device. When you get a new iPhone, simply downloading the app is not enough; the previous hardware association must be reset by an administrator in the Microsoft Entra admin center.

Contact Your Administrator

Reach out to your organization’s Microsoft 365 or Entra ID administrator and explain that you need to register a new iPhone for your work accounts.

Administrator Resets Registration

Ask the administrator to sign in to the Microsoft Entra admin center (https://entra.microsoft.com), navigate to Users > All users, select your account, and choose Authentication methods.

Require Re-registration

The administrator must click 'Require re-register multifactor authentication methods' to clear the old device binding.

Add Accounts to New iPhone

Once the reset is complete, open Microsoft Authenticator on your new iPhone, tap the '+' icon to add an account, select 'Work or school account', and follow the prompts to register both accounts.

Reset MFA Registration via Your IT Administrator

Note for Sole Administrators: If you are the only tenant administrator and are locked out of your account, you must contact Microsoft Support directly for account recovery assistance. Do not share passwords or verification codes in public forums.

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Frequently Asked Questions

Can I transfer Microsoft Authenticator directly from my old iPhone to my new one?

Yes, if you previously turned on cloud backup in Microsoft Authenticator on your old iPhone, you can select 'Begin recovery' on the new device. However, some organizations restrict this feature, meaning you may still need an administrator to reset your MFA.

Why do my work accounts require re-registration on a new device?

To prevent unauthorized access, organizations bind multifactor authentication to a specific physical device. Switching to a new phone requires the old device binding to be cleared by an administrator to securely authorize the new hardware.

What if I lost my old phone and cannot access my work accounts?

You must contact your company's IT helpdesk or Microsoft 365 administrator immediately. They can revoke the lost device's access tokens and trigger a requirement to re-register your MFA methods on your replacement device.

Login & Account Issues