How to sing in using using a another device

Question

I want sign in using my new mobile phone but I can’t because it keeps sending the code to the old mobile phone that I lost

Answer 1

If this is a work or school account, use this path:

1. On the sign-in screen, select Other ways to sign in or Sign in another way.
2. If another verification method was already set up, use that method to sign in.
3. If no other method is available, contact the organization’s IT help desk/admin and ask them to reset MFA settings or clear the old phone method so Authenticator can be registered again on the new phone.
4. If another admin is available, that admin can reset the MFA settings by requiring the account to provide contact methods again.

If this is a personal Microsoft account:

1. At sign-in, select I don't have any of these if access to the old phone number or email is no longer available.
2. Follow the prompts to add or verify new security info.
3. Do not change all security info at the same time, because the account may be restricted for 30 days.

If the old phone was lost or stolen, report it to the organization’s help desk so they can update the account. After the old settings are cleared, the next sign-in will prompt registration again.

If a sign-in request is being approved through Authenticator on another device, the normal flow is:

1. Enter the username and select Next.
2. Select Send notification.
3. If needed, select Other ways to sign in > Approve a request on my Microsoft Authenticator app.
4. Open Authenticator on the available mobile device, enter or tap the matching number, and approve.

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References:

• Sign in using Microsoft Authenticator
• Can't use Azure Multi-Factor Authentication to sign in to cloud services after you lose your phone or the phone number changes
• Troubleshoot Microsoft verification code issues
• Use a screen reader to set up and troubleshoot multifactor authentication
• Common problems with two-step verification for a work or school account