Microsoft 365 and Office | Subscription, account, billing | For home | Windows
Microsoft 365 features that help users manage their subscriptions, account settings, and billing information.
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The email address for the administrator is going to become inactive and we need to replace it with a new email address. We also need to update the address associated with other subscribers without our family plan.
While you can add an alias and use it for sign-in, you can't actually change the underlying e-mail address used with the account. In theory, you can ask Microsoft support to move the subscription to another e-mail, but it might be easier, and especially quicker, to cancel the current subscription and order a new one using the correct e-mail.