Hi, I'm John! I will help you with this.
Microsoft Q&A is public, and we can only provide information. It is beyond our capability to assist directly with the account.
For security and privacy reasons, only the original family organizer account can manage or remove members from a Microsoft Family group, even if that organizer email is old or no longer actively used.
At this point, the only path forward is to try to regain access to the original organizer account:
- If you remember the email address, use Microsoft’s account recovery form: https://account.live.com/acsr
- If you no longer remember the email address, you can try this lookup tool https://support.microsoft.com/account-billing/forgotten-your-microsoft-account-username-b2049472-3b8f-27d3-61c6-67a668453f4c Click on "Search" and follow the instructions provided.
If you’re able to recover the organizer account, you can then remove your account from the old family group (or change the settings) and add it to a new family if needed.
Please know that this is a public forum, and I can only provide information.
Click "Add comment" if you have any further questions or concerns.
Regards,
John J.D.