I've lost my microsoft account/accounts

Microsoft cannot send a full list of all email addresses linked to a phone number, but there are supported ways to look up and recover the correct Microsoft account.

Use these steps:

1. Look up usernames using your phone number
   • Go to the Look up your Microsoft account page and use your phone number as the security contact: Search.
   • Request a security code to your phone.
   • After entering the code, a hint of each username will be shown in a format like: j*******@outlook.com.
   • Repeat this for any other phone or email you may have used.
2. Check products or services where the account was used
   • Check all email accounts for receipts from Microsoft for the games bought (digital games, subscriptions, etc.). This can help identify which email address was used for purchases.
   • If the games were on Xbox, use the Xbox “Find your Microsoft email address walkthrough” linked from here: Check products or services where you used your Microsoft account.
3. Confirm whether an email is a Microsoft account
   • For any email address you suspect, go to https://account.microsoft.com and enter it.
   • If a password prompt appears, that address is a Microsoft account.
   • If the message says “We couldn't find an account with that username” or “That Microsoft account doesn't exist,” check spelling and domain or see if the account may have been closed.
4. If the username is known but won’t sign in
   • If a recovered username and password no longer work, follow the guidance in My username and password have stopped working and use Recover your account to reset the password: Recover your account.

If none of the hints match and the account has not been used for a long time, it may have been closed and may no longer be recoverable.

References:

• Forgotten your Microsoft account username
• Check products or services where you used your Microsoft account
• How to check if your email address is a Microsoft account
• My username and password have stopped working
• I can't sign in to my Microsoft account