Have unknown email and phone number attached to my email

ROBIN ROTHSCHILD 0 Reputation points
2026-09-06T21:46:14.84+00:00

I have an unknown email ending with bigpond.com and phone number ending with 80 attached to my msn.com email. I have screenshot Need someone to help me with this Serios issue

Outlook | Web | Outlook.com | Email

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  1. AI answer

    2026-09-06T21:46:30.1633333+00:00

    This can indicate either a compromised Microsoft account or changed security information. Take these steps immediately:

    1. Check recent account activity at https://account.live.com/activity.
      • Review sign-ins and security challenges.
      • Mark any unfamiliar activity as This wasn’t me.
    2. Review the email addresses attached to the Microsoft account.
      • Go to Edit account info at https://account.live.com/names/manage.
      • Remove any unknown email address if possible.
      • If an address is listed but unverified, use Verify only for addresses that belong to the account owner.
    3. Check sign-in and recovery methods.
      • Open the Microsoft account area used to manage sign-in methods.
      • Remove any unknown recovery email address or phone number.
      • Add trusted security information so account recovery remains possible.
    4. Restrict sign-in aliases.
      • Sign in to account.microsoft.com and go to Your info > Sign-in preferences.
      • Allow sign-in only for trusted aliases and save the change.
    5. If Outlook.com mail is also affected, inspect mailbox settings.
      • In Outlook.com, check Settings > Mail > Forwarding and disable any forwarding that was not added intentionally.
      • Check Settings > Mail > Rules and remove unfamiliar rules, especially rules that forward, redirect, move, or delete messages.
      • Review Sent Items, Deleted Items, Junk Email, Archive, blocked senders, and automatic replies.
    6. If sign-in is blocked or the unknown security info cannot be removed, use the Microsoft sign-in helper or contact support.
      • Sign-in issues can be diagnosed with the Sign-in helper.
      • Support can be reached through Contact Microsoft Support.
      • Support agents cannot send password reset links or directly change account details.

    If a verification prompt shows only unknown contact details, the accepted recovery path is to choose I don’t have any of these and complete the account recovery process.

    AI-generated content may be incorrect. Read our transparency notes for more information.

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  2. Thomas4-N 21,535 Reputation points Microsoft External Staff Moderator
    2026-09-09T10:20:29.1966667+00:00

    Hello ROBIN ROTHSCHILD,

    I understand why these unknown details are concerning.

    Where exactly do the unknown email address and phone number appear: under Your info, Security > Manage how I sign in, or a security info change is pending message? Also, can you still sign in and receive a verification code through any method you recognize?

    In the meantime:

    • Review Recent activity and mark any unfamiliar activity as This wasn’t me.
    • Change the account password.
    • Under Security > Manage how I sign in, add a trusted verification method and remove any method you do not recognize.
    • If you cannot verify the account because only the unknown details are offered, use the Microsoft Sign-in Helper.

    Please do not post the full email address, phone number, password, or verification codes here. Microsoft Q&A is a public community forum, so contributors cannot access or modify account information.

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