A free app and service that helps families create healthy digital habits and stay connected. It’s designed to support both online safety and real-world awareness by offering tools for screen time management, content filtering, and location sharing
If I understand correctly, you did not create or set up that email address for her, but it is already showing as a member of your Microsoft family group. If you do not recognize that email address and do not have any recovery information for it, the best option is to remove that account from your Microsoft family group.
After removing it, you can create a new Microsoft account/Outlook.com email for her, then add that new account as a Member in your Microsoft family group. Once the correct account is added, you should be able to share your Microsoft 365 Family subscription benefits with that account. If the account is for a child, the parent or family organizer will need to complete the required consent during the setup.