Office 2021 and Office LTSC 2021 are the next perpetual releases of Office. They include improvements over Microsoft Office 2019 and earlier versions of on-premises Office. For more information, see the following frequently asked questions.

When you accidentally delete Outlook items, such as email messages, calendar appointments, contacts, or tasks, you can often recover them if they are in your Deleted Items or Junk Email folders. In some cases, you can even recover items after the Deleted Items folder is emptied.

An array formula is a formula that can perform multiple calculations on one or more items in an array. You can think of an array as a row or column of values, or a combination of rows and columns of values. Array formulas can return either multiple results, or a single result.