Microsoft 365 features that help users manage their subscriptions, account settings, and billing information.
Hi
Microsoft accounts are separate, so the safest approach is to identify which account owns your Microsoft 365 subscription before closing anything.
First, use Microsoft’s username recovery page with your phone number or recovery email. It can show the Microsoft accounts associated with those details: https://account.live.com/username/recover
Then sign in to each account at https://account.microsoft.com/services. The account showing your active Microsoft 365 Home/Family subscription and billing is normally the one you should keep.
Please do not close the other accounts until you have checked whether they contain Outlook email, OneDrive files, purchases or subscriptions. Once you are certain an account is no longer required, follow Microsoft’s official closure instructions here: https://support.microsoft.com/en-us/accounts-billing/manage/how-to-close-your-microsoft-account
If this is a Microsoft 365 Family subscription, the other family members normally have their own Microsoft accounts, so those should not be deleted simply because they appear under the family subscription.
If you let me know what you see under Services & subscriptions, I can help you identify which account should remain.