Microsoft 365 features that help users manage their subscriptions, account settings, and billing information.
Hello,
Do you mean the Outlook Email app? If so, if it is Classic Outlook, unfortunately it is part of Microsoft 365, it cannot be purchased as a standalone.
If you meant the New Outlook, it is free, and it doesn't require the Microsoft 365 subscription.
If you mean the outlook.com email address you have, then it also doesn't require a subscription, unless you like the premium storage of 100GB for your mailbox instead of 15GB.