How to change my contact number in my school email?

Ma. June Villegas 0 Reputation points
2026-11-12T11:06:22.37+00:00

I can't use the phone number I used to verify my password because I've changed my phone number. What should I do? This email is very important to me.

Microsoft 365 and Office | Install, redeem, activate | For education | Other
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  1. AI answer

    2026-11-12T11:07:16.8133333+00:00

    If the old number is your only verification method, contact your school’s IT help desk or Microsoft 365 administrator and ask them to reset your authentication methods so you can register the new number.

    If you can sign in another way

    If Microsoft Authenticator, an alternate email, or another verification method still works:

    1. Open the Security info page: https://mysignins.microsoft.com/security-info.
    2. Sign in with your school email and choose the available verification method.
    3. Select Add sign-in method and choose Phone.
    4. Enter and verify your new phone number.
    5. After the new method works, select the old phone method and choose Delete or Remove.

    Microsoft also documents changing an existing entry by selecting Phone number and then Change.^1^

    Add the new method before removing the old one. The verification number is an authentication method, which is separate from the public phone number shown in your school profile.^1^

    If the old number is your only option

    You cannot complete verification yourself without another working method. Contact your school’s:

    • IT help desk
    • Student technology support office
    • Microsoft 365 administrator

    Provide your school email address and ask them to require MFA re-registration or add/reset your authentication phone method. Be prepared to follow the school’s identity-verification process.

    An administrator with at least the appropriate Authentication Administrator role can:

    1. Sign in to the Microsoft Entra admin center.
    2. Go to Entra ID → Users.
    3. Select your account.
    4. Open Authentication methods.
    5. Select Require re-register MFA.

    This removes registered phone, Microsoft Authenticator, and software OATH methods. At your next sign-in, you will be prompted to set up a new method.^1^

    If your school permits self-service recovery, you can also select I don’t have any of these at the verification prompt and follow the displayed recovery instructions. Some organizations disable self-service recovery, in which case only the school’s IT administrator can restore access.^2^

    Microsoft forum staff and ordinary Microsoft Support agents cannot directly change authentication details controlled by your school’s Microsoft 365 tenant.^3^

    After access is restored, register at least two permitted methods—such as the new number and Microsoft Authenticator—to reduce the chance of another lockout.

    References

    1. Manage user authentication methods for Microsoft Entra multifactor authentication
    2. Common problems with two-step verification for a work or school account
    3. How to change my phone number - Microsoft Q&A
    AI-generated content may be incorrect. Read our transparency notes for more information.

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  2. Fahim-Nz 265 Reputation points Independent Advisor
    2026-11-12T11:56:07.6233333+00:00

    Hello Ma. June,

    I understand that you've changed your phone number and can no longer receive verification codes sent to your old number. As a result, you cannot complete the verification process to recover access to your school email account.

    You can try the following:

    1/ Try another verification method

    When prompted for a verification code, select Sign in another way, if available. Check whether Microsoft Authenticator or another registered method is available.
    User's image

    2/ Register your new phone number

    If you can access your account using another verification method:

    1. Go to https://mysignins.microsoft.com/security-info.
    2. Sign in with your school email account.
    3. Select Add sign-in method.
    4. Choose Phone and follow the instructions to register your new number.

    If your old phone number is the only available option your school's Microsoft 365 administrator will need to help update your authentication information.

    The administrator can follow these steps:

    1. Sign in to the Microsoft Entra admin center.
    2. Navigate to Entra ID > Users > All users.
    3. Search for and select your school account.
    4. Open Authentication methods.
    5. Select + Add authentication method, choose Phone, and enter your new phone number.

    If the administrator needs to reset your MFA registration, they can select Require re-register MFA. This removes existing phone numbers and Microsoft Authenticator registrations, prompting you to set them up again during your next sign-in. Reference: Manage user authentication methods

    If this answer is helpful, please click "Yes". If you have additional questions, please click "Comment".

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