1. Microsoft Office 365 Personal One Time Purchase
2. Microsoft Office 365 Personal Lifetime
3. Microsoft Office 365 Personal Help
4. Install Office 365 Personal With Product Key

Hi Elemenophy, Microsoft 365 Personal and Microsoft 365 Business Basic are Microsoft 365 subscription, and Exchange Online is usually works as one license within Microsoft 365 for Business subscription (except Microsoft 365 Apps for business), and it is used for mail service, such as email, calendar, contact and task. Of course, there is also standard Exchange Online(Plan 1) and Exchange.

1. One-time purchases are available for both PCs and Macs. However, there are no upgrade options, which means if you plan to upgrade to the next major release, you'll have to buy it at full price. Microsoft 365 is a subscription that includes the most collaborative, up-to-date features in one seamless, integrated experience. Microsoft 365 includes the robust Office desktop apps that you’re familiar with, like Word.
2. Access to Office 365 Education is free for schools and students with a valid school email address. Access these powerful tools to enable 21st century learning and discovery. Office + Microsoft 365 Education. The best way to buy Office is with Microsoft 365 Education. Or by moving to an Office 365 personal.

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Need help cancelling your subscription?

Microsoft Office 365 Personal One Time Purchase

This article covers the steps to cancel your Microsoft subscriptions such as free trials, Xbox Live and Microsoft 365.

Tip: If your payment is past-due, you can cancel the subscription immediately. Once you cancel, you won't be charged for the past-due amount.

To cancel your Microsoft subscription

Microsoft Office 365 Personal Lifetime

1. Go to Services & subscriptions and sign in with the Microsoft account you used to purchase your subscription.

2. Find your subscription and select Manage. If you see Turn on recurring billing instead of Manage, skip to the Troubleshooting section - otherwise proceed to step 3.

3. On the next page, select Cancel or Upgrade or Cancel, depending on your subscription type.

4. Follow the instructions on the page to proceed with cancellation.

Note: In Israel, you have the right to cancel any subscription that has recurring billing with immediate effect and receive a prorated refund. For more info, see Cancel a Microsoft subscription in Israel.

Microsoft Office 365 Personal Help

Troubleshoot issues if you can't cancel your subscription

If you don't see Manage on your Services & subscriptions page, or can't cancel or turn off recurring billing, try the following:

Install Office 365 Personal With Product Key

• Make sure you're signed into the Microsoft account you used when purchasing your subscription.

• If you see Turn on recurring billing instead of Manage, your subscription will expire at the date shown for your subscription and you don't need to do anything else. To see details about your subscription, select Manage under the name of your subscription.

• Check if a payment method needs to be updated. If it does, we'll let you know when you arrive at Services & subscriptions. To fix any issues, go to Payment options.

• To see our complete cancellation policy, see Microsoft Store Terms of Sale.