Please note that this is a user-to-user community. As moderators, we have limited access to internal development details. Our role is to direct users to the appropriate support channels and resources. While we cannot provide backend analysis, we will do our best to assist within our responsibilities.
Thank you for reaching out to the Microsoft Q&A forum. I understand you are having problem with signing in to your Outlook.com because the account was blocked for suspicious activity and the verification code is going to an old phone number you no longer have access to. Please follow these steps:
- Use the unblock flow. Go to Unblock my Outlook.com account.
- If the “locked” screen asks for a phone number, enter a phone you can access (it does not need to be the old number). If you see “Microsoft account has been locked”, you can use any phone number to request the security code; it does not need to be associated with your account. Use your current number (or a trusted family member’s number you can access) to receive the code and proceed, then update security info after you regain access.
- If you are not receiving codes or get a “try another method” / “cannot send text” type error. Follow Troubleshoot Microsoft verification code issues .
- If you cannot verify with any method (only the old number is shown and there is no usable alternative). Use the account recovery form. Prepare a working contact email you can access, and as much accurate account history as possible.
- If the message indicates the account is disabled/suspended (not just “temporarily blocked/locked”). Submit the Account Reinstatement request form for a review of account status. Use this only when the sign-in experience indicates suspension/disabled state.
- If all steps fail
- Visit Contact - Microsoft Support
- Type a brief description of your issue in the search box
- Scroll down to the bottom > select Sign in to contact support
- Log in to another available personal Microsoft account.
- Under Products & Services, select "Other Products"; Under Categories, select "Manage account security", and click Confirm.
- Click "Chat with a support agent in your web browser" (during business hours)
Thank you for your understanding.