Microsoft 365 features that help users manage their subscriptions, account settings, and billing information.
Let's try to clarify the confusion. There are Microsoft Account (personal) and Work/School account. A bit confusing is that you can use work/school email address (email address is not the same as the account) to create and use Microsoft account. If you are using Personal Microsoft 365 services but also Business Microsoft 365 services, it can create some problems (system needs to know what account you want to use and sometimes it picks up the one you don't want to use at the moment). You can create a new email address and make it primary address for your personal Microsoft account.